Declining Kidney Function? Watch Out for Chronic Kidney Disease

Many people only find out they have chronic kidney disease after their kidney function has declined considerably. Early detection through blood and urine tests is very important, especially for people with hypertension and diabetes. Learn the signs, the causes, and how to keep your kidneys as healthy as possible.

Chronic kidney disease is a condition in which kidney function declines gradually over a long period, usually lasting for months to years. The kidneys play an important role in filtering waste from the blood, maintaining fluid and electrolyte balance, and helping to control blood pressure. When kidney function declines slowly, the body actually starts to change, but this often goes unnoticed at first.

Indeed, one reason chronic kidney disease is often diagnosed late is that its symptoms do not always appear in the early stages. Many people still feel healthy and go about their usual activities, even though their kidney function has already started to decline. However, by the time symptoms such as tiring easily, swollen legs, or changes in how often you urinate begin to appear, the condition has usually reached a more advanced stage. That is why early detection is so important.

In addition, chronic kidney disease is often closely linked to other, more common chronic diseases, such as hypertension, diabetes, and heart disease. High blood pressure and uncontrolled blood sugar levels can slowly damage the small blood vessels in the kidneys. Conversely, kidney problems can also worsen the health of the heart and blood vessels. This relationship is known as the heart-kidney-metabolic connection, in which one condition can affect the others.

In fact, chronic kidney disease can be detected early with simple laboratory tests, such as a blood creatinine test and an eGFR (estimated Glomerular Filtration Rate) calculation to assess kidney function. A urine test can also help find protein in the urine, which is an early sign of kidney damage. Chronic kidney disease often causes no symptoms until kidney function has declined considerably, so regular checkups are strongly recommended, especially for people with diabetes or hypertension.

The good news is that, although chronic kidney damage generally cannot be fully reversed, appropriate treatment can slow the decline in kidney function and prevent complications. Controlling blood pressure and blood sugar, eating a healthy diet, and having regular health checkups can help preserve kidney function for longer.

In this article, you will learn in full what chronic kidney disease is, which symptoms to watch for, its causes and risk factors, the stages of the disease, the tests you may need, and the steps you can take to protect your kidney health early on.

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What Is Chronic Kidney Disease?

Chronic kidney disease, or CKD, is a condition in which kidney function declines gradually and persists over a long period, usually more than three months. This decline occurs because of lasting damage to the kidney tissue, so the kidneys can no longer filter the blood optimally. As a result, waste and excess fluid can build up in the body and affect various organs.

Chronic kidney disease often develops slowly and frequently causes no symptoms in the early stages. That is why many people only find out they have this condition after a blood or urine test. For this reason, understanding how the kidneys work and how this disease develops is very important.

The Role of the Kidneys in the Body

The kidneys have many important functions that keep the body in balance. Beyond producing urine, the kidneys also play a role in many vital processes that affect overall health.

Some of the main functions of the kidneys include:

1. Filtering Waste and Toxins

First, the kidneys filter metabolic waste, toxins, and other residues from the blood, then remove them through urine. If this function is impaired, waste can build up in the blood and cause various health problems.

2. Regulating Fluid Balance

In addition, the kidneys regulate the amount of fluid in the body. The kidneys remove excess fluid or retain fluid when the body needs it. That is why kidney problems often cause swelling in the legs or face.

3. Regulating Electrolytes

The kidneys maintain the balance of electrolytes such as sodium, potassium, calcium, and phosphate. These electrolytes are important for the function of the nerves, muscles, and heart. An electrolyte imbalance can cause weakness, heart rhythm disturbances, and even muscle cramps.

4. Controlling Blood Pressure

The kidneys also help control blood pressure through a hormonal system and the balance of salt in the body. That is why chronic kidney disease is often linked to hypertension.

5. Producing Hormones

Furthermore, the kidneys produce important hormones such as:

• Erythropoietin, for the production of red blood cells
• Renin, to help regulate blood pressure
• Activated vitamin D, for bone health

Because of these many functions, kidney damage affects not only the urinary system, but also the blood, bones, heart, and blood pressure.

How Does Chronic Kidney Disease Develop?

Chronic kidney disease develops when kidney tissue is slowly damaged, so the ability to filter blood decreases little by little. This process usually takes years and is often caused by chronic diseases such as diabetes and high blood pressure, which damage the small blood vessels in the kidneys.

In the early stages, the kidneys can still adapt, so people with the condition often feel no symptoms. Over time, however, the damage increases and kidney function declines further. As a result, waste and fluid start to build up in the body.

However, it is important to know that although chronic kidney disease is progressive, the progression of kidney damage can often be slowed with treatment, lifestyle changes, and control of the underlying disease.

Differences Between Acute Kidney Injury and Chronic Kidney Disease

Many people still assume that all kidney problems are the same. In fact, acute kidney injury and chronic kidney disease are two different conditions.

Acute Kidney Injury	Chronic Kidney Disease
Occurs suddenly	Occurs slowly
Lasts days to weeks	Lasts months to years
Often caused by infection, dehydration, or certain medications	Often caused by diabetes or hypertension
Can recover if the cause is treated	Does not fully recover, but can be slowed
Can become an emergency	Usually develops without early symptoms

Why Is Early Detection of Chronic Kidney Disease Important?

Early detection is the most important step in managing chronic kidney disease. Simple tests such as a blood creatinine test, an eGFR calculation, and a urine test can help find kidney problems even before symptoms appear.

Because this disease often develops without symptoms in the early stages, people with risk factors such as diabetes, hypertension, heart disease, obesity, or a family history of kidney disease are advised to have their kidney function checked regularly.

The earlier chronic kidney disease is found, the greater the chance of slowing the decline in kidney function and preventing complications. After understanding what chronic kidney disease is and how it develops, the next important thing to know is what causes chronic kidney disease and what its risk factors are.

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Causes of Chronic Kidney Disease

Understanding the causes of chronic kidney disease is very important because many cases develop slowly without symptoms in the early stages. This disease is generally not caused by a single factor, but by a combination of chronic diseases, lifestyle, and certain medical conditions that damage the kidneys over the long term. That is why knowing the causes and risk factors can help prevent kidney damage before it becomes more severe.

Most cases of chronic kidney disease are linked to long-standing metabolic and cardiovascular diseases.

Main Causes of Chronic Kidney Disease

Here are some of the most common main causes of chronic kidney disease:

1. Diabetes

Diabetes is the most common cause of chronic kidney disease. High blood sugar levels over a long period can damage the small blood vessels in the kidneys. As a result, the kidneys cannot filter waste and fluid properly.

Over time, this condition can develop into diabetic nephropathy, kidney damage caused by diabetes that is one of the main causes of kidney failure.

2. Hypertension (High Blood Pressure)

Besides diabetes, hypertension is also a very common cause of chronic kidney disease. High blood pressure can damage the blood vessels in the kidneys, so the kidneys’ filtering ability decreases.

However, this often becomes a dangerous cycle. Damaged kidneys can make blood pressure rise even higher, and high blood pressure worsens kidney damage.

3. Heart and Blood Vessel Disease

Cardiovascular diseases such as coronary heart disease, heart failure, and atherosclerosis can reduce blood flow to the kidneys. If the kidneys receive too little blood flow over a long period, kidney function can slowly decline.

In fact, the kidneys and the heart are very closely connected. Damage to one organ often affects the other.

4. Recurrent Kidney Infections

Recurrent kidney infections, or pyelonephritis, can leave permanent scarring in the kidney tissue. If infections keep recurring over a long period, kidney function can decline and develop into chronic kidney disease.

5. Chronic Kidney Stones

Kidney stones that keep coming back or are not treated properly can block the urinary tract. As a result, pressure on the kidneys increases and, over time, can damage the kidney tissue.

6. Autoimmune Diseases

Some autoimmune diseases such as lupus can attack the kidney tissue and cause inflammation called glomerulonephritis. This condition can slowly damage the filtering units of the kidneys.

7. Congenital Kidney Abnormalities

Some people are born with abnormally formed kidneys, such as in polycystic kidney disease. These abnormalities can cause kidney function to decline gradually with age.

8. Long-Term Use of Certain Medications

Long-term use of certain medications without a doctor’s supervision, such as NSAID pain relievers, some antibiotics, or certain herbal remedies, can damage the kidneys if used continuously.

That is why long-term use of any medication should always be under the supervision of a medical professional.

Risk Factors for Chronic Kidney Disease

Besides the direct causes, there are several risk factors for chronic kidney disease that can increase a person’s chance of developing kidney damage.

From age to lifestyle, here are the risk factors:

• Age over 50
• A family history of kidney disease
• Diabetes
• Hypertension
• High cholesterol
• Obesity
• Smoking
• Heart disease
• Not drinking enough water
• Taking medications without a doctor’s supervision

Not everyone with risk factors will develop chronic kidney disease. However, the more risk factors a person has, the greater the chance of kidney damage later in life.

That is why people with diabetes, hypertension, or heart disease are strongly advised to have their kidney function checked regularly so that the causes of chronic kidney disease can be controlled early, before it progresses to kidney failure.

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Symptoms of Chronic Kidney Disease

Chronic kidney disease often develops slowly and “silently.” Many people do not notice a problem until kidney function has declined considerably. That is why recognizing the symptoms early is an important step so treatment can begin sooner and be more effective.

The symptoms of chronic kidney disease can vary widely, depending on the severity and the underlying cause. In the early stages, the signs are often nonspecific, so they are easy to overlook.

Symptoms of Early-Stage Chronic Kidney Disease

In the early stages, chronic kidney disease often causes no clear complaints. However, there are some mild signs to watch for:

• Often no symptoms → Many patients feel “fine,” even though their kidney function has started to decline.
• Tiring easily and weakness → Caused by the buildup of waste products in the body and reduced production of the hormone erythropoietin.
• Reduced appetite → The body begins to undergo metabolic changes that affect appetite.
• Mild swelling (edema) → Usually appears in the legs or ankles, due to fluid retention.
• Changes in how often you urinate → You may urinate more often, especially at night, or less often.
• Rising blood pressure → The kidneys help regulate blood pressure, so impaired kidney function can raise it.

However, these symptoms are often dismissed as ordinary tiredness or a sign of aging. That is why regular tests such as creatinine and eGFR checks are still strongly recommended, especially for people at risk.

Symptoms of Advanced Chronic Kidney Disease

As the disease progresses, the symptoms become more obvious and can interfere with daily activities. At this stage, chronic kidney disease already affects many systems in the body.

Here are the symptoms that commonly appear:

• Swelling in the legs, ankles, and face → Fluid buildup becomes more significant.
• Nausea and vomiting → Caused by the accumulation of toxins in the blood (uremia).
• Shortness of breath → Can occur because of excess fluid in the lungs or anemia.
• Itchy skin → Triggered by the buildup of metabolic waste in the body.
• Muscle cramps → An imbalance of electrolytes, such as calcium and phosphorus.
• Foamy urine → Indicates protein in the urine (proteinuria).
• Trouble sleeping → Metabolic disturbances and physical discomfort.
• Weakness, paleness, and low energy → Related to anemia caused by impaired kidney function.
• Fluid buildup (fluid overload) → Can worsen heart and lung conditions.

Furthermore, the National Kidney Foundation emphasizes that symptoms in the advanced stages often appear only when kidney damage is already significant. That is why early detection is key to slowing the progression of the disease.

Why Is It Important to Recognize Symptoms Early?

In fact, the symptoms of chronic kidney disease are often felt only when the condition has reached an advanced stage. Yet early intervention can help significantly slow kidney damage.

That is why you should:

• Not ignore mild symptoms that persist
• Have regular checkups, especially if you have risk factors
• Consult a doctor for a thorough evaluation

As a result, the sooner chronic kidney disease is detected, the greater the chance of maintaining quality of life and preventing serious complications.

Next, to understand how this condition develops, let us look at the stages of chronic kidney disease and what they mean for your health.

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Stages of Chronic Kidney Disease

Chronic kidney disease develops gradually through several levels of severity called stages. This classification helps doctors understand how far kidney function has declined and decide on the most appropriate treatment early on.

Staging is based on the eGFR (estimated Glomerular Filtration Rate), a measure of how effectively the kidneys filter waste from the blood. The lower the eGFR, the poorer the kidney function.

Chronic kidney disease is classified into five stages (1 to 5), from mild disease to kidney failure. This information is an important basis for medical decision-making.

Why Is It Important to Understand the Stages of Chronic Kidney Disease?

Understanding the stages of chronic kidney disease helps patients not only know their current condition, but also anticipate future risks.

• First, early stages (1 and 2): Kidney function is still relatively good. However, there are already signs of damage, such as protein in the urine. At this stage, early intervention can be very helpful.
• Second, the middle stage (3): Kidney function begins to decline more noticeably. In addition, complications such as anemia or bone and mineral disorders may begin to appear.
• Next, advanced stages (4 and 5): Kidney function declines sharply. As a consequence, the risk of kidney failure increases and the patient may need kidney replacement therapy.

That is why understanding the stages is not just about numbers, but a guide to acting sooner and more appropriately.

Table of Chronic Kidney Disease Stages Based on Glomerular Filtration Rate

Here is a general overview of the stages of chronic kidney disease based on eGFR values and the usual treatment approach:

Stage	eGFR Value (ml/min/1.73 m²)	Kidney Function	General Management
Stage 1	≥ 90	Normal kidney function, but signs of damage are already present	Risk factor control, healthy lifestyle, routine monitoring
Stage 2	60 to 89	Mildly reduced kidney function	Patient education, control of coexisting diseases, regular checkups
Stage 3	30 to 59	Moderately reduced kidney function	Evaluation of complications, more intensive therapy, close monitoring
Stage 4	15 to 29	Severely reduced kidney function	Preparation for further therapy (dialysis / transplant), management of complications
Stage 5	< 15	Kidney failure (very minimal function)	Dialysis or a kidney transplant is needed

This classification also highlights the importance of eGFR in assessing the severity of the disease.

Differences Between Early and Advanced Stages

The course of chronic kidney disease can be very different depending on the stage at which it is detected.

1. Early stages (1 and 2)
   • Often cause no symptoms
   • Damage can still be controlled
   • Focus on preventing progression
2. Advanced stages (4 and 5)
   • Symptoms are clearer and more complex
   • Higher risk of complications
   • Therapy such as dialysis is needed

However, not all patients progress at the same rate. With appropriate management, including control of blood pressure, blood sugar, and lifestyle, the decline in kidney function can be slowed significantly.

The Importance of Regular Kidney Function Monitoring

One of the most important steps in managing chronic kidney disease is routine monitoring.

The tests usually performed include:

• Blood tests (creatinine and eGFR) → to assess kidney function
• Urine tests → to detect protein or other abnormalities
• Blood pressure monitoring → because it is closely related to kidney function

In addition, if you have risk factors such as diabetes or hypertension, routine checkups become even more crucial.

Understanding the stages of chronic kidney disease allows for earlier detection, more targeted treatment, and prevention of more serious complications.

Next, let us discuss the tests used to diagnose chronic kidney disease, including which tests are needed and when you should get checked.

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Tests to Diagnose Chronic Kidney Disease

Chronic kidney disease cannot be diagnosed from symptoms alone, because in many cases it develops slowly without clear complaints. That is why doctors usually carry out a series of tests, from blood and urine tests to imaging, to assess the function and structure of the kidneys thoroughly.

Kidney function tests aim to:

1. Assess the kidneys’ ability to filter waste
2. Detect kidney damage early
3. Determine the stage of the disease
4. Look for the cause of the kidney problem
5. Monitor how the disease progresses

That is why a kidney evaluation usually involves not just one type of test, but a combination of several.

1. Blood Tests

A blood test is the first step in evaluating kidney function. Through a blood test, the doctor can see whether metabolic waste products are building up in the body because the kidneys are not working optimally.

Some important parameters in a blood test include:

Creatinine

Creatinine is a waste product of muscle activity that should be filtered by the kidneys and removed through urine. If the level of creatinine in the blood rises, this may indicate declining kidney function. However, creatinine levels can also be influenced by muscle mass, age, and sex, so creatinine is not used as the only indicator.

Estimated Glomerular Filtration Rate

eGFR is a calculation that estimates how well the kidneys filter blood each minute. The eGFR value is used to:

1. Determine the stage of chronic kidney disease
2. Assess the severity of kidney damage
3. Monitor how the disease progresses over time

In general, a decrease in eGFR that lasts more than three months may lead to a diagnosis of chronic kidney disease.

Urea (Blood Urea Nitrogen / BUN)

Urea is a waste product of protein metabolism. If the kidneys cannot filter properly, urea levels in the blood will rise. A urea test is usually done together with a creatinine test to give a more complete picture of kidney function.

Electrolytes

The kidneys play an important role in maintaining the balance of electrolytes such as:

• Sodium
• Potassium
• Chloride
• Bicarbonate

In kidney disorders, electrolyte balance can be disrupted, especially a rise in potassium, which can affect the heart rhythm. That is why an electrolyte test is an important part of evaluating kidney function.

2. Urine Tests

Besides blood tests, a urine test is very important for detecting kidney damage, even at an early stage when kidney function still looks normal on blood tests.

Some of the things usually checked in urine include:

Protein in the Urine (Proteinuria)

Protein should normally stay in the blood. If protein is found in the urine, this may indicate damage to the kidney’s filters (glomeruli).

Albumin in the Urine (Albuminuria)

Albumin is the type of protein most often tested. An Albumin-to-Creatinine Ratio (ACR) test can help detect early kidney damage, especially in patients with diabetes or hypertension.

Urinary Tract Infection

A urine test can also detect signs of infection such as:

• Bacteria
• White blood cells
• Nitrites

Recurrent urinary tract infections can damage the kidneys if they are not treated properly.

Blood in the Urine (Hematuria)

Blood in the urine can be a sign of several conditions, such as kidney stones, infection, kidney inflammation, or certain types of chronic kidney disease. That is why finding blood in the urine usually calls for further testing.

3. Supporting Tests

If blood and urine test results show a kidney problem, the doctor may recommend supporting tests to look at the structure of the kidneys directly and find the cause of the damage.

Kidney Ultrasound

Ultrasound is the most commonly performed test because it is safe and does not use radiation. An ultrasound can help show:

1. Kidney size
2. Kidney stones
3. Kidney cysts
4. Blockages in the urinary tract
5. Changes in kidney structure

In long-standing chronic kidney disease, the kidneys often become smaller.

CT Scan

A CT scan is used when a more detailed image of the kidneys is needed, for example to detect tumors, small kidney stones, or structural abnormalities of the kidneys that are not visible on ultrasound.

Kidney Biopsy

A kidney biopsy is done by taking a small sample of kidney tissue with a special needle to be examined in a laboratory. This test is usually performed when:

• The cause of kidney damage is unclear
• An autoimmune disease or glomerulonephritis is suspected
• Kidney damage is progressing quickly

A biopsy helps the doctor reach a more specific diagnosis and choose the most appropriate therapy.

When Should You Have Your Kidney Function Checked?

Many people do not realize they have chronic kidney disease until it has reached an advanced stage. That is why kidney function should be checked earlier, especially in people with risk factors.

You are advised to have your kidney function checked if you:

• Have diabetes
• Have hypertension
• Have a family history of kidney disease
• Have medical checkup (MCU) results showing abnormal creatinine or urine
• Have symptoms such as:
  • Swelling in the legs, hands, or face
  • Foamy urine
  • Changes in how often you urinate or how much urine you pass
  • Tiring easily
  • Reduced appetite

Blood tests, urine tests, and supporting tests play an important role in detecting chronic kidney disease early. Early detection is very important because kidney damage is often progressive and can lead to various other health problems. That is why, after understanding how it is diagnosed, it is also important to know the complications of chronic kidney disease that can occur if kidney function keeps declining.

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Complications of Chronic Kidney Disease

Chronic kidney disease affects not only kidney function, but can also cause various complications in other organs. This happens because the kidneys play an important role in regulating body fluids, electrolytes, blood pressure, red blood cell production, and bone health.

When kidney function declines gradually, various metabolic waste products and fluids can build up in the body. As a result, complications can develop slowly and are often only noticed when the disease has reached an advanced stage.

Patients with chronic kidney disease have a higher risk of heart disease, anemia, bone disorders, and even end-stage kidney failure.

End-Stage Kidney Failure

One of the most serious complications of chronic kidney disease is end-stage kidney failure, or end-stage kidney disease.

In this condition:

1. The kidneys can no longer filter waste from the blood
2. Fluid builds up in the body
3. Electrolyte balance is disrupted
4. Metabolic toxins rise in the blood

As a consequence, the patient needs kidney replacement therapy, such as dialysis or a kidney transplant, to stay alive.

However, not all patients with chronic kidney disease will go straight to kidney failure. With appropriate treatment and lifestyle changes, the progression of the disease can be slowed significantly.

Heart Disease and Cardiorenal Syndrome

One of the most common complications of chronic kidney disease is heart disease. The kidneys and the heart are very closely connected, a relationship known as cardiorenal syndrome, a condition in which kidney problems can worsen heart function, and vice versa.

Why can kidney disease affect the heart?

1. The kidneys regulate fluid balance in the body
2. The kidneys help control blood pressure
3. Kidney problems can cause fluid buildup that strains the heart
4. Chronic inflammation and blood vessel damage increase
5. Electrolyte disturbances can affect the heart rhythm

As a result, patients with chronic kidney disease have a higher risk of:

• Coronary heart disease
• Heart failure
• Heart rhythm disturbances
• An enlarged heart

That is why managing chronic kidney disease almost always goes hand in hand with controlling the risk of heart disease.

Anemia

The kidneys produce the hormone erythropoietin, which stimulates the production of red blood cells in the bone marrow. When the kidneys are damaged, production of this hormone decreases, so the number of red blood cells falls and anemia develops.

Symptoms of anemia in chronic kidney disease may include:

• Tiring easily
• Weakness
• Dizziness
• Mild shortness of breath
• Pale skin

However, anemia can be detected with a blood test and can usually be treated with appropriate therapy.

Bone and Mineral Disorders

In addition, the kidneys help maintain the balance of calcium, phosphorus, and vitamin D. When kidney function declines, the balance of minerals in the body is disrupted.

As a result, a bone disorder known as chronic kidney disease mineral and bone disorder can develop, with conditions such as:

1. More fragile bones
2. Bone pain
3. A higher risk of fractures
4. Impaired growth in children

That is why patients with chronic kidney disease usually also need to monitor the levels of calcium and phosphorus in their blood.

Fluid Buildup (Edema)

Kidneys that do not work properly cannot remove excess fluid from the body. As a result, fluid can build up and cause swelling, or edema.

Fluid buildup can cause:

1. Swelling in the legs and ankles
2. Swelling in the face
3. An enlarged abdomen due to fluid
4. Shortness of breath if fluid builds up in the lungs

In certain conditions, fluid buildup can increase the workload of the heart and lungs.

Electrolyte Disorders

The kidneys help maintain the balance of electrolytes such as sodium and potassium, as well as the body’s acid-base balance. In chronic kidney disease, this balance can be disrupted.

One of the most dangerous electrolyte disorders is hyperkalemia (high potassium), because it can cause:

1. Heart rhythm disturbances
2. Muscle weakness
3. In severe cases, cardiac arrest

Besides potassium, sodium disorders and metabolic acidosis can also occur in chronic kidney disease.

Hypertension That Is Hard to Control

Hypertension is not only a cause of chronic kidney disease, but can also be a complication once the kidneys are damaged.

Damaged kidneys can:

1. Activate a hormonal system that raises blood pressure
2. Cause fluid buildup
3. Disrupt sodium balance

As a result, blood pressure becomes harder to control even when the patient is already taking medication. Conversely, uncontrolled hypertension can also speed up kidney damage, creating a cycle in which each makes the other worse.

Dialysis or Kidney Transplant in the End Stage

In the advanced stages of chronic kidney disease, kidney function can fall below the level needed to keep the body in balance. In this condition, kidney replacement therapy is needed.

Treatment options include:

1. Dialysis: Dialysis helps filter waste and fluid from the blood artificially. This procedure is usually done routinely several times a week.
2. Kidney transplant: A kidney transplant is a procedure that replaces a damaged kidney with a healthy kidney from a donor. In some patients, a transplant can offer a better quality of life than dialysis.

However, any decision about these therapies must follow a thorough medical evaluation.

Why Is It Important to Prevent Complications Early?

As a final point, complications of chronic kidney disease often do not occur in isolation, but are interconnected, especially among the kidneys, the heart, and the blood vessels.

That is why:

1. Early detection is very important
2. Controlling blood pressure and blood sugar is essential
3. Regular checkups help prevent complications
4. Lifestyle changes play a major role in slowing the progression of the disease

Understanding the complications of chronic kidney disease helps patients stay more alert and take a more active part in their treatment. After understanding the complications that can occur, the next equally important step is to understand the treatment of chronic kidney disease and how to slow kidney damage.

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Treatment of Chronic Kidney Disease

Treatment of chronic kidney disease aims to slow kidney damage, control the underlying disease, and prevent complications that can affect the heart, bones, blood, and other organs. In many cases, kidney damage cannot be fully reversed. However, with appropriate treatment and lifestyle changes, the progression of the disease can be slowed significantly so patients can continue their activities with a good quality of life.

Treatment of chronic kidney disease usually involves a combination of medications, dietary changes, fluid control, and kidney replacement therapy in the advanced stages. That is why treatment focuses not only on the kidneys, but also on blood pressure, blood sugar, cholesterol, and heart health.

Goals of Treatment

In general, the main goal of treating chronic kidney disease is to preserve kidney function for as long as possible and prevent serious complications. Treatment is usually long term and requires regular monitoring.

Here are the main goals of treating chronic kidney disease:

1. Slowing kidney damage: First, treatment aims to slow the decline in kidney function. This is done by controlling blood pressure, blood sugar, diet, and a healthy lifestyle. With appropriate management, the need for dialysis can be delayed in many patients.
2. Controlling the underlying disease: Second, the doctor will focus on controlling underlying diseases such as diabetes and hypertension. In fact, these two diseases are the most common causes of chronic kidney disease. If the cause is not controlled, kidney damage will continue.
3. Preventing complications: Next, treatment aims to prevent complications such as anemia, heart disease, bone disorders, fluid buildup, and electrolyte disorders. That is why patients usually need regular blood and urine tests.
4. Maintaining the patient’s quality of life: As an important point, treatment aims not only to extend life, but also to maintain quality of life. Patients are expected to remain able to carry out their activities, work, and go about their daily lives well.

In other words, treating chronic kidney disease is long-term disease management, not short-term treatment.

Commonly Given Treatments

Treatment of chronic kidney disease is tailored to the cause, the stage of the disease, and the patient’s overall health. From medications to dietary changes, everything aims to reduce the kidneys’ workload and keep the body in balance.

Blood Pressure Medications

Controlling blood pressure is the most important step in treating chronic kidney disease. High blood pressure can damage the small blood vessels in the kidneys, so kidney function declines faster.

The doctor usually prescribes:

• ACE inhibitors
• ARBs (Angiotensin Receptor Blockers)
• Diuretics
• Other antihypertensive medications

Besides lowering blood pressure, some of these medications also help protect the kidneys from further damage.

Diabetes Medications

If chronic kidney disease is caused by diabetes, controlling blood sugar becomes very important. High blood sugar levels can slowly damage the blood vessels in the kidneys.

Treatment may include:

1. Antidiabetic medications
2. Insulin
3. Dietary changes
4. Regular blood sugar monitoring

Good blood sugar control can significantly slow the progression of chronic kidney disease.

Cholesterol Medications

Patients with chronic kidney disease have a higher risk of heart disease and stroke. That is why the doctor may prescribe cholesterol-lowering medications such as statins.

Controlling cholesterol helps:

1. Reduce the risk of heart disease
2. Protect the blood vessels
3. Reduce cardiovascular complications

This is important because many patients with chronic kidney disease develop complications in the heart and blood vessels.

Low-Salt Diet

Besides medications, dietary changes are an important part of treating chronic kidney disease. One of them is a low-salt diet.

A low-salt diet helps:

• Control blood pressure
• Reduce swelling
• Reduce fluid buildup
• Reduce the kidneys’ workload

Patients are usually advised to limit their sodium intake, especially from processed foods, canned foods, and fast food.

A Tailored Low-Protein Diet

In chronic kidney disease, eating too much protein can increase the kidneys’ workload because it produces more metabolic waste. However, the body still needs protein to maintain muscle mass and immunity.

That is why a doctor or dietitian will usually:

1. Set the daily amount of protein
2. Choose high-quality protein sources
3. Adjust the diet to the stage of kidney disease

This diet should be followed under the supervision of a medical professional so the patient does not become malnourished.

Fluid Control

At certain stages of chronic kidney disease, the body cannot remove excess fluid properly. As a result, fluid can build up and cause swelling and shortness of breath.

The doctor may advise:

1. Limiting how much you drink each day
2. Cutting back on high-salt foods
3. Using diuretic medications
4. Monitoring your body weight daily

Fluid control is especially important for patients with advanced chronic kidney disease.

Dialysis

If kidney function has declined severely, the patient may need dialysis. Dialysis is a procedure that filters waste and fluid from the blood using a machine.

Dialysis is usually needed when:

• Kidney function is very low
• Toxins build up in the blood
• Fluid buildup cannot be controlled
• Dangerous electrolyte disturbances occur

Dialysis does not cure chronic kidney disease, but it takes over part of the function of kidneys that are no longer working.

Kidney Transplant

A kidney transplant is a procedure that replaces a damaged kidney with a healthy kidney from a donor. In some patients, a transplant can offer a better quality of life than long-term dialysis.

However, a transplant requires:

1. A matching kidney donor
2. Major surgery
3. Lifelong immunosuppressive medication
4. Regular medical monitoring

A transplant is usually an option for end-stage kidney failure in patients who meet the medical requirements.

Treating Chronic Kidney Disease Requires a Long-Term Commitment

As a final point, treating chronic kidney disease is a long-term process that requires cooperation between the patient, the doctor, and the family. Regular treatment, routine follow-up, an appropriate diet, and a healthy lifestyle can slow kidney damage and prevent serious complications.

That is why, after understanding the treatment of chronic kidney disease, the next equally important step is to understand how to prevent chronic kidney disease, especially for people with risk factors such as diabetes, hypertension, or a family history of kidney disease.

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How to Prevent Chronic Kidney Disease

Preventing chronic kidney disease is much easier than treating it once kidney function has declined. In fact, many cases of chronic kidney disease develop slowly without clear symptoms. That is why prevention is very important, especially for people with risk factors such as diabetes, hypertension, obesity, or a family history of kidney disease.

In general, preventing chronic kidney disease focuses on keeping your blood vessels healthy and your blood pressure and blood sugar levels stable. The kidneys filter blood all the time, so anything that damages the blood vessels over the long term will directly affect kidney function.

How to Keep Your Kidneys Healthy

Here are some important steps recommended by various health organizations and doctors to keep your kidneys healthy and prevent chronic kidney disease.

1. Control Your Blood Pressure

First, keeping your blood pressure normal is one of the most important steps. High blood pressure can slowly damage the small blood vessels in the kidneys. If left untreated, the kidneys will lose their ability to filter blood properly.

Try to keep your blood pressure within the normal limit recommended by your doctor. Things you can do include:

1. Cutting back on salt
2. Exercising regularly
3. Managing stress
4. Taking hypertension medication as prescribed by your doctor, if needed

That is why people with hypertension need to have their kidney function checked regularly.

2. Control Your Blood Sugar

Besides blood pressure, high blood sugar levels are also a major cause of kidney damage. Diabetes can damage the kidneys’ filtering system over the long term.

If you have diabetes or prediabetes, it is important to:

1. Manage your diet
2. Avoid excess sugar
3. Exercise regularly
4. Take medication or insulin as advised by your doctor
5. Have your HbA1c checked regularly

With good blood sugar control, the risk of chronic kidney disease can be reduced significantly.

3. Drink Enough Water

The kidneys need enough fluid to help remove metabolic waste and toxins from the body through urine. However, you should not drink excessive amounts of water either, especially if you already have a kidney or heart condition.

In general, fluid needs are about 1.5 to 2 liters per day, but this amount can vary depending on your health condition, activity level, and the weather.

4. Limit Your Salt Intake

Eating too much salt can raise blood pressure and burden the kidneys. Many people do not realize that most salt actually comes from processed foods, not just from table salt.

Foods that should be limited:

1. Instant foods
2. Canned foods
3. Chips and salty snacks
4. Packaged sauces
5. Processed meats such as sausages and nuggets

Cutting back on salt is one simple way that may help prevent chronic kidney disease.

5. Do Not Smoke

Smoking can damage the blood vessels, reduce blood flow to the kidneys, and speed up the decline in kidney function. In addition, smoking also increases the risk of hypertension and heart disease, which are closely linked to kidney disease.

Quitting smoking protects not only your kidneys, but also your heart, lungs, and blood vessels as a whole.

6. Exercise Regularly

Next, regular exercise helps keep your blood pressure, blood sugar levels, and body weight within healthy ranges. You do not need strenuous exercise; what matters is doing it consistently.

Examples of exercise that are good for kidney health:

• Walking
• Cycling
• Swimming
• Light aerobics
• Yoga

Aim for at least 30 minutes of exercise a day, 3 to 5 times a week.

7. Maintain an Ideal Body Weight

Excess body weight increases the risk of diabetes, hypertension, and other metabolic diseases that can damage the kidneys. That is why maintaining an ideal body weight is an important part of preventing chronic kidney disease.

Ways to maintain your weight:

1. Eating a balanced diet
2. Cutting back on foods high in sugar and fat
3. Exercising regularly
4. Getting enough sleep

8. Avoid Taking Medications Without Supervision

Many people do not realize that long-term use of certain medications can damage the kidneys, especially NSAID pain relievers (nonsteroidal anti-inflammatory drugs) when taken in excess without a doctor’s supervision.

In addition, some jamu (traditional Indonesian herbal remedies) or herbal supplements with unclear ingredients can also harm the kidneys. That is why you should always consult a doctor before taking any medication or supplement regularly.

9. Regular Medical Checkups

Chronic kidney disease often causes no symptoms in the early stages. For this reason, regular health checkups are very important to detect kidney problems early.

A medical checkup usually includes:

1. A blood pressure check
2. A blood sugar test
3. A kidney function test
4. A urine test

Early detection can slow or even prevent further kidney damage.

10. Check Your Creatinine and Glomerular Filtration Rate

As a final point, creatinine and eGFR tests are the most important way to find out how well your kidneys are working. The eGFR shows how well the kidneys filter the blood.

If your eGFR decreases or your creatinine rises, the doctor can start treatment promptly to keep chronic kidney disease from getting worse.

People who are advised to have their kidney function checked regularly:

1. People with diabetes
2. People with hypertension
3. People with obesity
4. Smokers
5. People over 40
6. People with a family history of kidney disease

Preventing chronic kidney disease does not depend on a single habit, but on a combination of a healthy lifestyle, control of chronic diseases, and regular health checkups. By managing your blood pressure, blood sugar, diet, and body weight, and by having your kidney function checked regularly, the risk of kidney damage can be reduced significantly.

These preventive steps are also an important foundation before we discuss diet and foods that are good for people with chronic kidney disease in the next section.

Read Also:

• Beware of Diabetes! Know the Causes, Symptoms, Treatment, and Prevention
• Understanding Hypertension: Symptoms, Causes, Treatment, and Prevention
• Watch Out for Obesity! Know Its Causes and the Effects That Threaten Your Health
• 9 Dangers of Smoking: Facts and Health Risks You Need to Know
• Optimal Health at 40+: How to Prevent Heart Disease and Stay Active

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Good Foods for People With Chronic Kidney Disease

Managing your diet is an important part of managing chronic kidney disease. When kidney function declines, the body cannot remove waste products, fluid, and certain minerals optimally. That is why choosing the right foods can help reduce the kidneys’ workload, maintain electrolyte balance, and lower the risk of complications, including heart disease, which is often closely linked to kidney conditions.

In fact, it should be emphasized that intake of sodium, potassium, phosphorus, protein, and fluid needs to be managed individually, depending on the stage of the disease and the patient’s condition.

Recommended Foods for People With Chronic Kidney Disease

Not all foods need to be avoided. On the contrary, choosing the right foods can help maintain the quality of life of people with chronic kidney disease.

1. Low-Potassium Vegetables

Vegetables remain an important source of fiber and antioxidants. However, you need to choose low-potassium types, especially if your kidney function has already declined.

Recommended examples:

• Cabbage
• Cauliflower
• Carrots
• Cucumber
• Lettuce
• Green beans
• Eggplant

In addition, the way you cook also matters. Boil or steam vegetables without much salt to keep their benefits without burdening the kidneys.

2. Low-Potassium Fruits

You can still eat fruit, but you need to be selective. Too much potassium can affect the heart rhythm.

Fruits that are relatively safe:

• Apples
• Pears
• Grapes
• Pineapple
• Strawberries
• Watermelon

However, high-potassium fruits such as bananas and avocados should be limited, especially if lab results show high potassium levels.

3. Quality Protein in Controlled Portions

Protein is still important for maintaining muscle and immunity. However, in chronic kidney disease, eating too much protein can speed up the buildup of waste products in the blood.

Better protein choices:

• Egg whites
• Fish
• Skinless chicken
• Tofu and tempeh (in measured amounts)

That is why the doctor will usually adjust protein needs based on the stage of chronic kidney disease and the patient’s metabolic condition.

4. Fluid Intake Based on Your Condition

Fluid needs are not always the same for every patient. In the early stages, drinking enough water helps the kidneys filter. However, in certain conditions, such as swelling or reduced urine output, fluid intake actually needs to be limited.

So always follow your doctor’s advice on how much fluid to have each day.

Foods to Limit in Chronic Kidney Disease

On the other hand, some types of food can worsen kidney conditions if eaten in excess. That is why it is important to recognize and limit them.

1. High-Salt (Sodium) Foods

Salt can raise blood pressure and cause fluid retention.

Limit:

• Instant foods
• Canned foods
• Salty snacks
• Fast food
• High-sodium sauces and soy sauce

As a positive consequence, cutting back on salt can help control blood pressure and protect kidney function.

2. Processed Foods

Processed foods often contain sodium, added phosphates, and preservatives.

Examples:

• Sausages and nuggets
• Processed meats
• Ready-to-eat frozen meals
• Instant noodles

Furthermore, fresh foods are much more advisable because their nutrient content is easier to control.

3. Excess Protein

Not only too little, but also too much protein carries risks. The kidneys have to work harder to process the waste products of protein metabolism.

That is why you should:

1. Avoid eating too much meat
2. Adjust protein portions to medical advice

4. High-Potassium Foods

If the kidneys cannot remove potassium, its level can rise and become dangerous for the heart.

Limit:

• Bananas
• Avocados
• Potatoes
• Spinach
• Tomatoes
• Coconut water

However, these restrictions are individual and depend on blood test results.

5. High-Phosphorus Foods

High phosphorus can cause bone and blood vessel disorders.

High-phosphorus sources:

• Dairy products (milk, cheese, yogurt)
• Nuts and legumes
• Carbonated soft drinks

6. Sweetened Drinks

Drinks high in sugar can worsen blood sugar control and increase the risk of metabolic complications.

Limit:

• Soda
• Sweetened packaged drinks
• Energy drinks
• Drinks with added syrup

Overall, diet management in chronic kidney disease focuses on balance, not just restriction. From choosing low-salt foods and controlling protein to limiting potassium and phosphorus, everything aims to keep kidney function stable for as long as possible.

However, each patient has different needs. That is why consulting a doctor or dietitian is very important so your diet stays safe while still meeting your daily nutritional needs.

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When Should You See a Doctor?

Many people do not realize that chronic kidney disease can develop slowly without clear symptoms. That is why recognizing early signs and risk factors is very important so treatment can begin earlier.

You should have your kidney function checked if you experience certain symptoms or have a condition that increases the risk of kidney damage.

1. Swelling in the Legs, Face, or Around the Eyes

First, watch for swelling (edema), especially in the:

• Legs and ankles
• Face
• Eyelids

This happens because the kidneys cannot remove excess fluid properly. As a result, fluid builds up in the body’s tissues. If swelling appears for no clear reason and persists, you should get checked right away.

2. High Blood Pressure That Is Hard to Control

High blood pressure has a two-way relationship with the kidneys. On one hand, hypertension can damage the kidneys. On the other hand, kidney problems can also cause blood pressure to rise.

That is why, if your blood pressure:

• Is hard to control
• Requires many medications
• Or keeps rising

then a kidney function test becomes an important step.

3. Having Diabetes

In fact, diabetes is the main cause of chronic kidney disease. High blood sugar levels over the long term can damage the small blood vessels in the kidneys.

That is why people with diabetes are advised to:

1. Have their creatinine checked regularly
2. Measure their eGFR
3. Have a urine test to check for protein

Even if there are no symptoms, screening should still be done regularly.

4. High Creatinine or Low Glomerular Filtration Rate Results

Next, lab results are often the clearest early sign. Many cases of chronic kidney disease are detected during a medical checkup (MCU).

Pay attention if your results show:

• Elevated creatinine
• Decreased eGFR
• Protein or albumin in the urine

If any of these are found, do not delay; consult a doctor promptly for further evaluation.

5. Foamy or Changed Urine

Persistently foamy urine can indicate protein in the urine (proteinuria). This points to damage to the kidney’s filters.

In addition, other changes such as:

• Darker urine
• Changes in how often you urinate

also need attention. However, these symptoms are often taken lightly, even though they can be an early sign of chronic kidney disease.

6. Tiring Easily and Weakness

Impaired kidneys can cause toxins to build up and reduce the production of the hormone that makes red blood cells. As a result, the body develops anemia.

Common symptoms:

• Tiring quickly
• Weakness
• Difficulty concentrating

Because these symptoms are common, many people do not link them to kidney problems. Yet a simple test can help identify the cause.

7. Shortness of Breath

In certain conditions, kidney problems can cause:

• Fluid buildup in the lungs
• Or anemia that reduces oxygen in the body

As a result, a person may experience shortness of breath. If it comes with swelling or fatigue, this condition needs to be checked right away.

8. A Family History of Kidney Failure

Besides symptoms, risk factors also matter. If you have:

• A parent
• A sibling

with a history of kidney failure, your risk is higher.

That is why regular kidney function tests are still needed, even if you feel healthy.

9. Abnormal Medical Checkup Results

Finally, do not ignore MCU results that look “slightly” abnormal.

For example:

• Slightly elevated creatinine
• Slightly decreased eGFR
• High blood pressure or blood sugar

As a consequence, these early findings can be an important opportunity to prevent chronic kidney disease from progressing.

When Should You Not Delay Seeing a Doctor?

See a doctor right away if you experience:

• Unusual swelling
• Persistently foamy urine
• High blood pressure
• Tiring easily for no clear reason
• Shortness of breath

This is even more important if you have diabetes or a family history of kidney disease.

Recognizing the signs and risk factors is an important step in the early detection of chronic kidney disease. The sooner this condition is identified, the greater the chance of slowing kidney damage and preventing serious complications.

That is why you should not wait for symptoms to become severe. Simple tests such as blood and urine tests can be a very meaningful first step in protecting your kidney health.

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Conclusion

Chronic kidney disease is a condition in which kidney function declines gradually over a long period. This decline often happens slowly, and in many cases it causes no symptoms in the early stages. That is why many people only find out they have kidney disease after their kidney function has declined considerably. Chronic kidney disease often develops without clear symptoms until it reaches an advanced stage, so regular checkups are very important.

In fact, the main causes of chronic kidney disease are diabetes and high blood pressure. Both conditions can slowly damage the small blood vessels in the kidneys. In addition, other factors such as a family history of kidney disease, heart disease, obesity, and age can also increase the risk. That is why people with these risk factors are advised to have their kidney function checked regularly, even if they feel healthy.

However, it is important to understand that chronic kidney disease does not always lead directly to kidney failure. If it is detected early, kidney damage can be slowed through appropriate treatment and lifestyle changes. From controlling blood pressure and blood sugar, watching your diet, and limiting salt to quitting smoking and exercising regularly, all of these play a role in keeping kidney function stable. With good management, many people with chronic kidney disease can continue to live active and productive lives.

In addition, regular kidney function tests are an important step for early detection. Simple tests such as creatinine, eGFR, and urine tests can help find kidney problems before serious symptoms appear. That is why a regular medical checkup is important not only for your heart or blood sugar, but also for your kidney health.

As a final point, being aware of the need for checkups and controlling chronic diseases are key to preventing chronic kidney disease from getting worse. The sooner this condition is identified, the greater the chance of slowing kidney damage, preventing complications, and maintaining quality of life in the long term.