The kidneys perform several essential functions every day. They filter waste products from the blood, help control fluid balance, regulate electrolytes, contribute to blood-pressure regulation and support the production of red blood cells.

When kidney function becomes impaired, changes may occur gradually or suddenly.

People searching for symptoms of kidneys not working properly often expect one obvious warning sign. However, kidney problems can produce a wide range of symptoms, and early kidney disease may cause few or no noticeable symptoms.

As kidney function declines, symptoms may become more apparent. Changes in urination, swelling, persistent tiredness, nausea, itching and breathlessness can occur, although these symptoms can also have many other causes.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation for abnormal kidney function and suspected kidney disease.

1. Changes in How Often You Urinate

A noticeable change in urination can sometimes indicate a kidney or urinary problem.

You may notice:

• Urinating much less than usual

• Urinating more frequently

• Increased urination at night

• Difficulty passing urine

• Changes in urine volume

Reduced urine output can be particularly concerning when it develops suddenly.

However, urinary changes can also result from dehydration, diabetes, urinary infections, prostate problems, medicines and other conditions. Testing is needed to identify the actual cause.

2. Swelling Around the Feet, Ankles or Eyes

When the kidneys cannot remove excess sodium and fluid effectively, fluid may accumulate in the body.

This can result in swelling, known as edema.

Swelling may appear around:

• Ankles

• Feet

• Legs

• Hands

• Eyelids or face

Swelling does not automatically mean kidney disease. Heart, liver, venous and other medical conditions can also cause edema.

Persistent or unexplained swelling should be medically evaluated.

3. Foamy or Frothy Urine

Persistent foamy urine may sometimes be associated with increased protein in the urine.

Healthy kidneys normally prevent substantial amounts of protein from passing into urine.

When the kidney's filtering structures are damaged, protein such as albumin may leak into the urine.

A urine test, particularly an urine albumin-to-creatinine ratio, can help determine whether significant albumin loss is present.

Occasional bubbles in urine do not necessarily indicate kidney disease.

4. Blood in the Urine

Pink, red, brown or tea-colored urine can sometimes indicate blood in the urinary tract.

Possible causes include:

• Kidney stones

• Urinary infections

• Kidney disease

• Prostate or bladder conditions

• Certain medicines

• Other urinary tract problems

Blood in the urine should not simply be assumed to be a sign of kidney failure.

Medical evaluation can determine where the blood is coming from and why it is present.

5. Persistent Tiredness and Weakness

People with reduced kidney function may experience persistent fatigue or weakness.

Advanced kidney disease can contribute to anemia and accumulation of waste products, both of which can affect energy levels.

However, tiredness is extremely common and can also result from:

• Poor sleep

• Anemia from other causes

• Thyroid disorders

• Nutritional deficiencies

• Infections

• Stress

• Other chronic illnesses

If fatigue is persistent or unexplained, a medical evaluation can help identify the cause.

6. Nausea, Poor Appetite or Vomiting

As kidney function becomes severely impaired, waste products can accumulate in the bloodstream.

This may contribute to:

• Nausea

• Poor appetite

• Vomiting

• An unpleasant taste in the mouth

• Weight loss

These symptoms are not specific to kidney disease and can occur with gastrointestinal, metabolic and infectious conditions.

Persistent vomiting combined with reduced urine output or known kidney dysfunction requires prompt medical attention.

7. Itching and Dry Skin

Persistent itching can occur in people with advanced kidney disease.

Kidney-related itching may be associated with abnormalities in mineral balance and other changes that occur as kidney function becomes severely impaired.

Dry skin and scratching can cause:

• Redness

• Scratch marks

• Small skin injuries

• Increased irritation

Itching alone does not prove that the kidneys are failing. Allergies, skin disorders, medicines and many other conditions can cause itching.

8. Breathlessness

Shortness of breath can occur in severe kidney dysfunction when excess fluid accumulates in the body and affects the lungs.

Breathlessness can also result from heart disease, lung disease, anemia, infection and other conditions.

Sudden or severe breathlessness requires urgent medical assessment, particularly when accompanied by swelling, chest discomfort or markedly reduced urine output.

9. Muscle Cramps or Weakness

Kidney disease can affect the body's electrolyte and mineral balance.

Changes involving potassium, calcium, phosphorus and other substances may contribute to:

• Muscle cramps

• Weakness

• Abnormal heart rhythms

• Numbness or other symptoms

Electrolyte disturbances can become serious, so unexplained severe weakness or abnormal heart symptoms should not be ignored.

10. Difficulty Concentrating or Feeling Confused

Severe kidney dysfunction can cause accumulation of waste products that affect the nervous system.

Some people may develop:

• Difficulty concentrating

• Excessive sleepiness

• Confusion

• Changes in alertness

Confusion can have many causes and should always be assessed promptly, particularly when it develops suddenly.

11. High Blood Pressure That Is Difficult to Control

The kidneys play an important role in regulating blood pressure.

Kidney disease and high blood pressure can therefore influence each other.

Persistently high or difficult-to-control blood pressure may be a reason to assess kidney function, especially when other risk factors are present.

A blood-pressure problem does not automatically mean that the kidneys are failing, but it should be appropriately evaluated.

12. Changes in Body Weight or Appetite

Advanced kidney disease may affect appetite and nutrition.

Some people may lose weight because of:

• Reduced appetite

• Nausea

• Chronic illness

• Dietary restrictions

• Changes in taste

Unexpected weight loss should be investigated rather than attributed to kidney disease without testing.

Can Kidney Problems Have No Symptoms?

Yes.

This is one of the most important facts about kidney disease.

Some people with chronic kidney disease have few noticeable symptoms until kidney function has already declined significantly.

This is why people at increased risk may need kidney-function testing even when they feel healthy.

Testing may be particularly important for people with:

• Diabetes

• High blood pressure

• Cardiovascular disease

• Family history of kidney disease

• Previous acute kidney injury

• Recurrent kidney stones

• Certain autoimmune conditions

• Known kidney abnormalities

What Tests Show Whether the Kidneys Are Working Properly?

Symptoms alone cannot determine how well the kidneys are functioning.

A doctor may recommend several tests.

Serum Creatinine

Creatinine is a waste product removed mainly by the kidneys. A higher blood creatinine level can indicate reduced filtration, although other factors can influence the result.

eGFR

The estimated glomerular filtration rate provides an estimate of kidney filtration and is commonly used to assess kidney function.

Urine Albumin Testing

Urine albumin testing can identify abnormal protein loss through the kidneys.

Urinalysis

A routine urine examination may detect:

• Blood

• Protein

• Infection-related findings

• Other abnormalities

Blood Tests

Depending on the situation, doctors may check:

• Potassium

• Sodium

• Bicarbonate

• Hemoglobin

• Calcium

• Phosphorus

• Blood glucose

Kidney Imaging

Ultrasound or other imaging may be recommended when doctors need to assess kidney size, obstruction, stones, cysts or structural abnormalities.

What Causes Kidneys to Stop Working Properly?

Kidney dysfunction can develop for many different reasons.

Common causes include:

Diabetes

Long-term high blood glucose can damage kidney blood vessels and filtering structures.

High Blood Pressure

Uncontrolled hypertension can damage the kidneys over time.

Acute Kidney Injury

A sudden decline in kidney function can occur because of dehydration, severe infection, low blood pressure, certain medicines, obstruction or other serious illness.

Kidney Stones and Obstruction

A stone or another blockage can interfere with urine drainage and, in some situations, impair kidney function.

Glomerular Diseases

Diseases affecting the kidney's filtering units can cause proteinuria, blood in urine and declining kidney function.

Inherited Kidney Conditions

Some genetic disorders can progressively affect kidney structure and function.

Medication-Related Kidney Injury

Certain medicines can affect kidney function in susceptible individuals.

The underlying cause needs to be identified before appropriate treatment can be selected.

Can Kidney Function Improve?

Sometimes.

Kidney function may improve when the problem is acute and reversible.

For example, appropriate treatment may improve kidney function when reduced filtration is caused by:

• Dehydration

• Certain medication effects

• Urinary obstruction

• Some infections

• Other reversible causes of acute kidney injury

Established chronic kidney damage may not be completely reversible.

In chronic kidney disease, treatment generally focuses on protecting remaining kidney function, controlling the underlying cause and managing complications.

What Can You Do to Protect Kidney Function?

If your kidney tests are abnormal or you have risk factors for kidney disease, several measures may help protect kidney health.

Control Blood Pressure

Follow the blood-pressure target recommended by your healthcare professional.

Manage Diabetes

If you have diabetes, appropriate glucose management is an important part of kidney protection.

Avoid Unnecessary Painkillers

Some NSAID painkillers can affect kidney function, particularly in people with chronic kidney disease or during dehydration.

Ask a healthcare professional before using these medicines regularly.

Maintain Appropriate Fluid Intake

Adequate hydration is important for many people, but people with advanced kidney or heart conditions may have individualized fluid restrictions.

Do not force excessive water intake without medical advice.

Follow an Individualized Diet

Depending on kidney function, your doctor or renal dietitian may recommend adjustments to sodium, protein, potassium, phosphorus or fluid intake.

When Should You See a Nephrologist?

A nephrologist specializes in medical kidney conditions.

Specialist evaluation may be appropriate if you have:

• Persistently elevated creatinine

• Reduced eGFR

• Protein or albumin in urine

• Unexplained blood in urine

• Difficult-to-control blood pressure

• Recurrent kidney stones

• Repeated kidney infections

• Progressive decline in kidney function

• Electrolyte abnormalities

• Known chronic kidney disease

Early evaluation can help identify kidney problems and determine appropriate monitoring or treatment.

When Are Kidney Symptoms an Emergency?

Some symptoms require immediate medical attention.

Seek urgent care for:

• Very little or no urine

• Severe breathlessness

• Chest pain

• New confusion or altered consciousness

• Persistent vomiting with inability to maintain fluids

• Severe swelling with breathing difficulty

• Severe flank pain with fever or chills

• Sudden major deterioration in health

These symptoms can indicate serious kidney, urinary, heart or systemic complications.

Kidney Evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation for patients concerned about kidney function or symptoms of kidney disease.

Depending on the patient's condition, evaluation may include:

• Review of symptoms and medical history

• Blood-pressure assessment

• Creatinine and eGFR evaluation

• Urine testing

• Protein or albumin assessment

• Electrolyte evaluation

• Review of diabetes-related kidney risk

• Assessment of kidney stones or urinary obstruction

• Kidney disease monitoring

• Long-term nephrology care when required

Treatment is individualized according to the underlying condition, kidney function and overall health.

Frequently Asked Questions

What are the symptoms of kidneys not working properly?

Possible symptoms include changes in urination, swelling, foamy urine, blood in urine, persistent fatigue, nausea, itching, muscle weakness and breathlessness. However, early kidney disease may cause no symptoms.

How do I know if my kidneys are failing?

Symptoms alone cannot confirm kidney failure. Blood tests such as creatinine and eGFR, along with urine tests and clinical evaluation, are needed to assess kidney function.

Can kidney problems be present without pain?

Yes. Many kidney diseases, particularly chronic kidney disease, may cause little or no pain during the early stages.

Is frequent urination a sign of kidney problems?

It can occur with certain kidney or urinary conditions, but frequent urination also has many other causes, including diabetes, urinary infections and prostate problems.

Is foamy urine always a sign of kidney disease?

No. Temporary bubbles can occur for harmless reasons. Persistent foamy urine, particularly when associated with protein in urine, should be evaluated.

Can tiredness indicate poor kidney function?

Yes, advanced kidney disease can contribute to fatigue, but tiredness has many possible causes. Kidney-function testing can help determine whether the kidneys are involved.

What is the best test to check kidney function?

Creatinine with eGFR is commonly used to assess filtration, while urine albumin testing and urinalysis provide additional information about kidney damage. Doctors may recommend other tests depending on the situation.

Conclusion

Knowing the symptoms of kidneys not working properly can help people recognize when medical evaluation may be necessary. Changes in urination, swelling, persistent fatigue, foamy urine, nausea, itching and breathlessness can occur when kidney function is impaired, particularly as disease becomes more advanced.

However, symptoms alone cannot determine how well the kidneys are functioning. Some kidney diseases cause few or no symptoms in their early stages.

If you have risk factors for kidney disease or notice persistent changes in urine, swelling, unexplained fatigue or other concerning symptoms, appropriate blood and urine testing can help identify problems early.

For specialist assessment of kidney function and kidney-related symptoms, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and does not constitute medical advice, diagnosis or treatment. The symptoms described above can have many causes and do not by themselves confirm kidney disease or kidney failure. Kidney function should be assessed using appropriate medical history, examination, blood tests, urine tests and imaging when indicated. Do not start, stop or change medicines, supplements, fluid intake or diet based solely on this article. Seek urgent medical attention for very little or no urine, severe breathlessness, chest pain, new confusion, persistent vomiting, severe swelling with breathing difficulty, severe flank pain with fever or rapidly worsening symptoms. Consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for individualized medical evaluation.