Renal failure, also called kidney failure, occurs when the kidneys lose enough function that they can no longer adequately maintain the body's internal balance.
The kidneys normally filter waste products from the blood, remove excess fluid through urine, regulate electrolytes and acid-base balance, and contribute to blood-pressure control and red blood cell production.
Renal failure can develop suddenly or progress gradually over a long period. The cause, speed of progression and remaining kidney function determine the appropriate treatment.
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation and management for patients with acute and chronic kidney disorders.
Renal Failure vs Reduced Kidney Function
The terms kidney disease, reduced kidney function and renal failure are sometimes used interchangeably, but they do not mean exactly the same thing.
A person can have kidney disease while the kidneys are still functioning sufficiently.
Renal failure generally refers to severe loss of kidney function, particularly when the kidneys can no longer adequately maintain fluid, electrolyte and waste balance.
Early identification of kidney disease is important because appropriate treatment may slow progression in many patients.
What Causes Renal Failure?
Renal failure can result from many different conditions.
Diabetes
Diabetes is a major cause of chronic kidney disease. Persistently elevated blood glucose can damage the kidney's filtering structures over time.
High Blood Pressure
Long-standing uncontrolled hypertension can damage blood vessels within the kidneys and contribute to progressive kidney dysfunction.
Acute Kidney Injury
A sudden reduction in kidney function can occur because of:
- Severe dehydration
- Serious infection
- Major blood loss
- Low blood pressure
- Certain medications
- Toxins
- Urinary obstruction
- Severe illness
Some cases of acute kidney injury improve when the underlying cause is promptly identified and treated.
Glomerular Diseases
Diseases affecting the kidney's filtering units can cause proteinuria, blood in urine and declining kidney function.
Polycystic Kidney Disease
Inherited disorders such as polycystic kidney disease can progressively affect kidney structure and function.
Kidney Stones and Urinary Obstruction
A severe or prolonged blockage of urine flow can damage kidney function.
Recurrent Kidney Infections
Repeated or severe infections may contribute to kidney damage in some patients.
Acute Renal Failure
Acute renal failure, more commonly called acute kidney injury (AKI), develops over a short period.
Possible warning signs include:
- Reduced urine output
- Swelling
- Breathlessness
- Nausea
- Vomiting
- Confusion
- Fatigue
- Changes in blood pressure
However, some patients with AKI have few symptoms and are diagnosed through blood tests.
AKI can sometimes be reversible, depending on its cause and severity.
Chronic Renal Failure
Chronic kidney disease develops over time.
Kidney damage may initially be silent. As kidney function declines, complications can develop involving:
- Fluid balance
- Electrolytes
- Blood pressure
- Red blood cells
- Bone and mineral metabolism
- Nutrition
Advanced chronic kidney disease can eventually progress to kidney failure.
What Are the Symptoms of Renal Failure?
Symptoms depend on how quickly kidney function has declined and how severe the impairment is.
Possible symptoms include:
Changes in Urination
Patients may notice:
- Less urine than usual
- More frequent urination
- Increased nighttime urination
- Foamy urine
- Blood in urine
Urinary changes can have many causes and require appropriate assessment.
Swelling
Reduced kidney function can cause fluid retention, resulting in swelling of the:
- Feet
- Ankles
- Legs
- Hands
- Face
Fatigue
Advanced kidney disease can cause significant tiredness and reduced physical stamina. Anemia can contribute to these symptoms.
Nausea and Poor Appetite
As waste products accumulate, some people may experience nausea, vomiting, loss of appetite or an unpleasant taste in the mouth.
Itching
Persistent itching can occur in advanced kidney disease, particularly when mineral and bone abnormalities are present.
Breathlessness
Fluid accumulation can contribute to shortness of breath.
Difficulty Concentrating
Advanced kidney dysfunction can affect mental alertness and concentration.
Can Renal Failure Occur Without Symptoms?
Yes.
Kidney disease can progress silently, particularly during its earlier stages.
Some people discover reduced kidney function only after routine blood or urine testing.
This is why people with diabetes, hypertension, cardiovascular disease, a family history of kidney disease or other risk factors may need regular kidney-health monitoring.
How Is Renal Failure Diagnosed?
Diagnosis involves more than one test.
Blood Tests
Doctors may assess:
- Serum creatinine
- eGFR
- Blood urea
- Sodium
- Potassium
- Bicarbonate
- Hemoglobin
- Other tests based on the suspected cause
Urine Tests
Urine testing can detect:
- Protein
- Albumin
- Blood
- Signs of infection
- Other abnormalities
Imaging
Ultrasound or other imaging may be recommended to assess:
- Kidney size
- Kidney structure
- Cysts
- Stones
- Urinary obstruction
Additional Tests
Depending on the suspected cause, specialized blood tests, immunological tests or sometimes a kidney biopsy may be considered.
What Is eGFR?
Estimated glomerular filtration rate (eGFR) is an estimate of how effectively the kidneys filter blood.
In general, a lower eGFR indicates reduced kidney filtration.
Chronic kidney disease is commonly categorized using eGFR:
| Category | eGFR |
|---|---|
| G1 | 90 or higher |
| G2 | 60–89 |
| G3a | 45–59 |
| G3b | 30–44 |
| G4 | 15–29 |
| G5 | Less than 15 |
These categories should not be interpreted in isolation. The duration of abnormal kidney function, urine findings and overall medical condition are also important.
What Happens in Advanced Renal Failure?
When kidney function becomes severely reduced, the kidneys may struggle to remove:
- Waste products
- Excess fluid
- Potassium
- Acid
Patients may also develop complications such as:
- Anemia
- Bone and mineral abnormalities
- High blood pressure
- Fluid overload
- Electrolyte disturbances
- Poor appetite
- Fatigue
At this stage, the nephrology team may discuss kidney replacement therapy.
Renal Failure Treatment
Treatment depends on whether kidney dysfunction is acute or chronic and what caused it.
Possible approaches include:
Treating the Underlying Cause
Examples may include treating infections, correcting dehydration, relieving urinary obstruction or managing inflammatory kidney diseases.
Blood Pressure Management
Appropriate blood-pressure control can help protect remaining kidney function.
Diabetes Management
Good glucose control is important for patients with diabetic kidney disease.
Managing Proteinuria
Certain medicines may reduce protein loss in the urine and protect kidney function in appropriate patients.
Managing Complications
Treatment may address:
- Anemia
- High potassium
- Acidosis
- Fluid overload
- Bone and mineral abnormalities
Dialysis
Dialysis may be required when severe kidney dysfunction causes complications that cannot be adequately controlled with other medical measures.
Kidney Transplantation
For suitable patients with irreversible kidney failure, transplantation may be considered as an alternative to long-term dialysis.
When Is Dialysis Needed for Renal Failure?
A person does not automatically require dialysis simply because their creatinine is elevated or eGFR is low.
The decision is based on the overall clinical condition.
Dialysis may be considered when there are serious problems such as:
- Severe fluid overload
- Certain dangerous electrolyte abnormalities
- Severe acid-base disturbances
- Significant symptoms from accumulation of waste products
- Other complications that cannot be adequately managed medically
In acute kidney injury, dialysis may sometimes be temporary if kidney function recovers.
Can Renal Failure Be Reversed?
The answer depends on the cause.
Acute Kidney Injury
Some forms of acute kidney injury can improve significantly after treatment of the underlying problem.
Chronic Kidney Disease
Long-standing kidney damage generally cannot simply be reversed. However, appropriate treatment can often slow progression and manage complications.
A sudden deterioration in kidney function should always be investigated because potentially reversible causes may be present.
Renal Failure and Diabetes
Diabetes can damage the kidney's filtration system over many years.
People with diabetes should discuss regular monitoring of:
- Blood glucose
- HbA1c
- Serum creatinine
- eGFR
- Urine albumin
- Blood pressure
Early detection of diabetic kidney disease allows appropriate management to be considered.
Renal Failure and High Blood Pressure
Hypertension can damage the kidneys, while advanced kidney disease can make blood pressure harder to control.
This creates a cycle in which kidney dysfunction and high blood pressure can worsen one another.
Managing blood pressure appropriately is therefore an important component of kidney care.
What Should Patients With Renal Failure Eat?
There is no single diet that is appropriate for every person with renal failure.
Dietary recommendations may depend on:
- Kidney function
- Potassium level
- Phosphorus level
- Fluid status
- Dialysis status
- Diabetes
- Blood pressure
- Nutritional requirements
Depending on the individual situation, a renal dietitian may provide guidance regarding sodium, protein, potassium, phosphorus and fluid intake.
Patients should not make major dietary restrictions without professional guidance because excessive restriction can lead to inadequate nutrition.
How Can You Protect Remaining Kidney Function?
If kidney function is already reduced, protecting remaining function becomes particularly important.
Helpful measures may include:
- Keep blood pressure under appropriate control
- Manage diabetes effectively
- Take prescribed medicines correctly
- Avoid unnecessary over-the-counter medicines
- Avoid unverified herbal or “kidney cleansing” products
- Maintain an appropriate body weight
- Reduce excessive salt intake
- Attend scheduled kidney-function tests
- Treat urinary infections promptly
- Follow individualized dietary recommendations
- Maintain appropriate physical activity when medically suitable
When Should You See a Nephrologist?
A nephrologist should be considered when there is:
- Persistent elevated creatinine
- Reduced eGFR
- Protein or albumin in urine
- Recurrent blood in urine
- Difficult-to-control hypertension
- Acute kidney injury
- Chronic kidney disease
- Recurrent kidney stones
- Significant swelling
- Electrolyte abnormalities
- Rapidly declining kidney function
- Advanced kidney failure
Early specialist assessment can help identify the cause and establish an appropriate management strategy.
Emergency Symptoms in Renal Failure
Seek urgent medical attention if you experience:
- Severe difficulty breathing
- Chest pain
- Confusion or reduced consciousness
- Very little or no urine
- Severe weakness
- Persistent vomiting
- Severe swelling associated with breathing difficulty
- High fever with severe flank pain
- Severe symptoms associated with suspected urinary obstruction
These symptoms can indicate serious complications and require prompt medical assessment.
Renal Failure Care at Prabhakar Bhurke Clinic
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialized evaluation and management for patients with kidney disease and renal failure.
Depending on individual needs, care may include:
- Evaluation of abnormal kidney-function tests
- Acute kidney injury management
- Chronic kidney disease monitoring
- Diabetes-related kidney care
- Hypertension-related kidney management
- Proteinuria evaluation
- Electrolyte and fluid management
- Advanced kidney disease care
- Dialysis-related nephrology management
- Kidney transplant evaluation and follow-up
Treatment is individualized according to the patient's cause of kidney dysfunction, laboratory results, symptoms and overall health.
Frequently Asked Questions About Renal Failure
Is renal failure the same as kidney failure?
Yes. “Renal failure” and “kidney failure” are commonly used to describe severe loss of kidney function.
Can renal failure happen suddenly?
Yes. Acute kidney injury can cause a rapid decline in kidney function over a short period.
What is the first sign of renal failure?
There may be no obvious first symptom. Changes in creatinine, eGFR or urine findings may appear before noticeable symptoms.
Is renal failure always permanent?
No. Some cases of acute kidney injury can improve. Chronic irreversible kidney failure, however, generally requires long-term management and may require dialysis or transplantation.
Does high creatinine always mean renal failure?
No. Creatinine can increase for several reasons. It should be interpreted alongside eGFR, previous results, urine findings and the clinical situation.
Can a person live with renal failure?
Yes, many people with advanced kidney failure receive ongoing kidney replacement therapy such as dialysis or, when suitable, kidney transplantation. Individual outcomes vary considerably.
Conclusion
Renal failure represents severe impairment of the kidneys' ability to maintain the body's internal balance. It may develop suddenly as acute kidney injury or gradually as a consequence of chronic kidney disease.
Because kidney disease can remain silent, regular monitoring is particularly important for people with diabetes, high blood pressure and other risk factors. When renal failure develops, treatment focuses on addressing the underlying cause, preserving remaining kidney function, managing complications and determining whether dialysis or kidney transplantation is appropriate.
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized kidney care for patients with acute and chronic renal disorders.
Medical Disclaimer
This article is intended for general educational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Renal failure can have many causes, and treatment must be individualized according to kidney function, laboratory findings, symptoms and overall health. Do not start, stop or change medicines, dialysis schedules, fluid intake or dietary restrictions based solely on this article. If you experience severe breathlessness, chest pain, confusion, very little or no urine, severe swelling, persistent vomiting or rapidly worsening symptoms, seek urgent medical attention.
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