Kidney failure can develop gradually or occur suddenly. In either situation, the kidneys may become unable to remove waste products and excess fluid from the body effectively. Because kidney disease can progress without obvious symptoms in its earlier stages, understanding the signs and symptoms of kidney failure is important.

The symptoms can vary depending on how quickly kidney function changes and how advanced the condition has become. Some people may experience noticeable changes in urination or swelling, while others may initially have few or no symptoms.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides evaluation and management for kidney disorders and declining kidney function.

What happens when the kidneys start failing?

The kidneys perform several important functions. They filter waste products from the blood, regulate fluid and electrolyte balance, contribute to blood pressure regulation and support red blood cell production and bone health.

When kidney function becomes severely reduced, waste products and excess fluid can accumulate. Changes in electrolytes and other body systems may also produce symptoms.

The severity and combination of symptoms depend on the underlying cause and degree of kidney dysfunction.

Common signs and symptoms of kidney failure

1. Changes in urination

Changes in normal urination can sometimes indicate a kidney or urinary tract problem.

A person may notice:

• Urinating less frequently
• Producing less urine
• Increased urination, particularly at night
• Foamy or bubbly urine
• Blood in the urine
• Changes in urine appearance

Not every change in urine indicates kidney failure. Persistent or unexplained changes should be evaluated.

2. Swelling in the legs, ankles or face

When the kidneys cannot adequately eliminate excess salt and fluid, fluid may accumulate in the body.

Swelling may appear around:

• Feet
• Ankles
• Lower legs
• Hands
• Face
• Area around the eyes

Sudden or rapidly increasing swelling should be medically assessed.

3. Persistent tiredness and weakness

Severe kidney dysfunction may contribute to fatigue and weakness.

One reason can be anemia, which may develop because diseased kidneys produce less erythropoietin, a hormone involved in red blood cell production.

However, fatigue is extremely common and can have many causes. Kidney function testing is needed to determine whether kidney disease is involved.

4. Nausea and loss of appetite

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

This may contribute to:

• Nausea
• Reduced appetite
• Vomiting
• Changes in taste
• An unpleasant taste in the mouth

Persistent nausea or vomiting should not be ignored, especially in someone who already has kidney disease.

5. Breathlessness

Breathlessness can occur with severe kidney dysfunction when excess fluid accumulates in the body.

It can also be caused by heart, lung and other medical conditions.

New or severe breathing difficulty requires prompt medical evaluation.

6. Persistent itching

Some people with advanced kidney dysfunction develop persistent itching.

Changes in mineral and electrolyte balance and accumulation of substances that healthy kidneys normally remove may contribute to this symptom.

Unexplained persistent itching has many possible causes, so it requires proper assessment.

7. Muscle cramps

Muscle cramps can occur when fluid and electrolyte levels become abnormal.

Repeated or severe cramps may be related to kidney dysfunction but can also result from dehydration, medication effects, nutritional issues or other conditions.

8. Sleep problems

People with advanced kidney disease may experience difficulty sleeping or changes in their normal sleep pattern.

Restless legs and discomfort can also interfere with sleep.

9. Difficulty concentrating

Significant accumulation of waste products may affect mental alertness.

A person may experience:

• Difficulty concentrating
• Reduced alertness
• Confusion
• Changes in memory
• Excessive sleepiness

Confusion or a significant change in consciousness requires urgent medical attention.

10. High blood pressure

Kidney disease and high blood pressure are closely connected.

High blood pressure can contribute to kidney damage, while kidney dysfunction can also make blood pressure more difficult to control.

Persistently elevated blood pressure should therefore be evaluated and treated appropriately.

Can kidney failure occur without symptoms?

Yes. This is an important reason why relying only on symptoms can be misleading.

Early chronic kidney disease may cause few or no obvious symptoms. A person may discover reduced kidney function through routine blood or urine testing.

People with diabetes, hypertension or other kidney disease risk factors may therefore benefit from periodic kidney health assessments as advised by their healthcare professional.

Signs that may indicate worsening kidney function

Certain changes deserve particular attention, especially in someone with known kidney disease.

These include:

• Increasing swelling
• A significant reduction in urine output
• Persistent nausea or vomiting
• Increasing weakness
• New confusion
• Worsening breathlessness
• Difficulty controlling blood pressure
• Significant changes in blood test results

These symptoms do not automatically mean kidney failure, but they warrant medical evaluation.

What causes kidney failure?

Kidney failure can have many causes.

Common contributors include:

Diabetes

Long-term high blood glucose can damage the kidney's filtering structures and gradually reduce kidney function.

High blood pressure

Uncontrolled hypertension can damage kidney blood vessels and contribute to chronic kidney disease.

Acute kidney injury

A sudden reduction in kidney function can occur because of severe dehydration, infections, certain medicines, low blood pressure, urinary obstruction or other medical problems.

Glomerular diseases

Conditions affecting the kidney's filtering units can cause progressive kidney damage.

Polycystic kidney disease

This inherited condition can cause numerous cysts to develop in the kidneys and may eventually impair kidney function.

Recurrent urinary obstruction

Kidney stones, prostate enlargement and other causes of urinary blockage can sometimes affect kidney function.

Other systemic conditions

Autoimmune diseases, cardiovascular conditions and other disorders can also contribute to kidney damage.

How is kidney failure diagnosed?

Symptoms alone cannot diagnose kidney failure.

Doctors may use several investigations, including:

Blood creatinine

Serum creatinine provides information about kidney filtration and is used when estimating kidney function.

eGFR

Estimated glomerular filtration rate helps assess how efficiently the kidneys are filtering blood.

Urine testing

Urinalysis and urine albumin or protein measurements can identify evidence of kidney damage.

Electrolyte testing

Blood levels of potassium, sodium, bicarbonate and other substances may be checked when kidney function is significantly impaired.

Kidney imaging

Ultrasound or other imaging may be recommended to assess kidney size, structure, stones, cysts or urinary obstruction.

Who should be especially careful about kidney symptoms?

People with a higher risk of kidney disease may benefit from regular monitoring.

This includes people with:

• Diabetes
• High blood pressure
• A family history of kidney disease
• Previous kidney disease
• Recurrent kidney stones
• Cardiovascular disease
• Previous acute kidney injury
• Certain autoimmune diseases
• Long-term exposure to medicines that may affect kidney function

Your doctor can recommend an appropriate screening schedule based on your health history.

Can kidney failure be prevented?

Not every case of kidney failure can be prevented. However, controlling conditions that damage the kidneys may help slow progression.

Important measures can include:

• Maintaining healthy blood pressure
• Managing diabetes
• Following medical advice regarding kidney-protective medicines
• Avoiding unnecessary medications that may harm the kidneys
• Maintaining a healthy weight
• Following an appropriate diet
• Avoiding tobacco
• Staying adequately hydrated when medically appropriate
• Attending recommended kidney function tests

People who already have kidney disease may require individualized dietary and fluid recommendations.

When are kidney failure symptoms an emergency?

Some symptoms require immediate medical attention.

Seek urgent care for:

• Very little or no urine
• Severe breathing difficulty
• Rapidly worsening swelling
• Severe or persistent vomiting
• Significant confusion
• Extreme drowsiness
• Chest discomfort
• Sudden severe weakness
• Rapid deterioration in general health

These symptoms may occur with severe kidney dysfunction but can also indicate other serious medical conditions.

Kidney failure evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke provides specialist evaluation for patients experiencing symptoms that may be associated with kidney dysfunction.

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

• Detailed medical history
• Physical examination
• Blood pressure evaluation
• Serum creatinine
• eGFR assessment
• Urine examination
• Urine protein or albumin testing
• Electrolyte testing
• Kidney ultrasound or other imaging
• Evaluation of the underlying cause
• Monitoring of kidney function over time

Treatment is determined according to the underlying disease, severity and individual patient needs.

Frequently Asked Questions

What are the most common signs and symptoms of kidney failure?

Common symptoms of advanced kidney dysfunction can include reduced urine output, swelling, fatigue, nausea, appetite changes, itching, muscle cramps, sleep problems and breathlessness. Some people may have no symptoms during earlier stages.

Is frequent urination a sign of kidney failure?

Frequent urination can occur with several conditions and does not necessarily indicate kidney failure. Diabetes, urinary infections and prostate or bladder problems are among the other possible causes.

Is swelling always caused by kidney failure?

No. Swelling can result from heart, liver, venous, medication-related and other conditions. Kidney function and other medical causes should be evaluated.

Can kidney failure cause back pain?

Kidney failure itself does not typically cause severe back pain. Kidney stones, infections and other urinary conditions can cause pain in the back or flank.

Can kidney failure be reversed?

Some causes of sudden kidney dysfunction can improve when treated promptly. Chronic kidney disease may not be fully reversible, but appropriate treatment can sometimes slow further loss of kidney function.

What test is most important for kidney function?

Blood creatinine and eGFR are important measures of kidney filtration, while urine testing helps identify kidney damage. A complete evaluation may require several tests rather than one measurement.

Conclusion

The signs and symptoms of kidney failure can vary considerably. Changes in urination, swelling, fatigue, nausea, itching, muscle cramps, breathlessness and changes in mental alertness can occur as kidney function becomes significantly impaired. However, many people with early kidney disease have no obvious symptoms.

For this reason, people with diabetes, high blood pressure, previous kidney disease or other risk factors should discuss appropriate kidney screening with their healthcare professional.

Recognizing concerning symptoms and checking kidney function at the right time can help identify problems earlier and guide appropriate treatment.

For specialist kidney evaluation and management, patients can consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational purposes only and does not constitute medical advice, diagnosis or treatment. The signs and symptoms described can have many different causes and do not independently confirm kidney failure. Diagnosis requires appropriate clinical evaluation and may include blood tests, urine tests, imaging and other investigations. Do not start, stop or change medication based solely on this article. Severe breathlessness, very low or absent urine output, confusion, chest discomfort, severe vomiting or rapidly worsening swelling require prompt medical attention. For personalized assessment and treatment, consult Dr. Sandip Prabhakar Bhurke or another qualified healthcare professional.