Kidney problems in kids can range from temporary infections and urinary problems to conditions that affect kidney development or kidney function over many years.

Children's kidneys perform many important jobs. They remove waste products from the blood, help control fluid and electrolyte balance, contribute to blood-pressure regulation and play a role in maintaining healthy bones and blood production.

Kidney problems may develop because of:

• Conditions present from birth
• Genetic or inherited disorders
• Urinary tract abnormalities
• Infections
• Kidney stones
• Immune-related kidney diseases
• Dehydration or severe illness
• Certain medicines
• Conditions such as diabetes or high blood pressure
• Acute kidney injury
• Chronic kidney disease

Some childhood kidney conditions produce obvious symptoms, while others may be discovered during a urine or blood test performed for another reason.

Early recognition can be important because appropriate treatment may help protect kidney function and support normal growth and development.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist kidney evaluation and management for patients with kidney-related concerns.

Why Are Healthy Kidneys Important During Childhood?

Kidneys are important throughout childhood because the body is continuously growing and developing.

Healthy kidneys help maintain:

• Appropriate fluid balance
• Electrolyte levels
• Blood pressure
• Removal of metabolic waste
• Acid-base balance
• Hormonal functions involved in red blood cell production
• Processes important for bone health

When kidney function is significantly impaired, these functions can be affected.

Children with long-standing kidney disease may also experience problems with nutrition, growth, energy levels or puberty, depending on the severity and duration of the condition.

Common Kidney Problems Seen in Children

Childhood kidney disorders can have very different causes.

Urinary Tract Infections

Urinary infections can occur in children and may sometimes involve the kidneys.

Younger children may not describe typical urinary symptoms. Instead, they may develop:

• Fever
• Irritability
• Poor feeding
• Vomiting
• Abdominal discomfort
• Changes in urination

Repeated urinary infections may require investigation for an underlying urinary-tract abnormality.

Congenital Kidney and Urinary Tract Conditions

Some children are born with differences in the development or structure of the kidneys or urinary system.

Examples include:

• Abnormal kidney development
• Kidney abnormalities
• Vesicoureteral reflux
• Urinary tract obstruction
• Abnormal drainage of urine

The significance varies from child to child, so evaluation should be individualized.

Kidney Stones

Although kidney stones are more common in adults, children can also develop them.

Possible symptoms include:

• Side or abdominal pain
• Blood in urine
• Pain during urination
• Nausea
• Vomiting
• Urinary urgency
• Recurrent urinary infections

Children who develop stones may require evaluation for dietary, metabolic, genetic or other contributing factors.

Glomerular Kidney Diseases

The kidney contains tiny filtering structures called glomeruli.

Certain diseases can cause inflammation or damage to these filters.

Possible findings include:

• Blood in urine
• Protein in urine
• Swelling
• High blood pressure
• Reduced kidney function

Some glomerular disorders can develop after infections or as part of immune-related conditions.

Nephrotic Syndrome

Nephrotic syndrome is characterized by significant protein loss through the urine and can cause swelling.

Parents may notice:

• Puffiness around the eyes
• Swelling of the legs or feet
• Abdominal swelling
• Frothy urine
• Sudden weight gain from fluid retention

Children with suspected nephrotic syndrome require medical assessment.

Acute Kidney Injury

Acute kidney injury means kidney function has decreased suddenly.

Possible triggers in children include:

• Severe dehydration
• Serious infection
• Low blood pressure
• Certain medications or toxins
• Urinary obstruction
• Other serious illnesses

Some cases improve when the underlying problem is treated promptly.

Chronic Kidney Disease

Chronic kidney disease occurs when kidney damage or reduced kidney function persists over time.

In children, chronic kidney disease may be related to congenital abnormalities, inherited disorders, urinary tract problems, glomerular disease or other medical conditions.

Long-term follow-up may be needed to monitor kidney function, blood pressure, nutrition and growth.

Early Signs of Kidney Problems in Kids

The signs depend on the type and severity of the kidney condition.

Parents should discuss persistent or unexplained symptoms with a healthcare professional, particularly:

Changes in Urination

Look for:

• Urinating much more or much less than usual
• Pain or burning during urination
• New bedwetting after previously staying dry
• Urgent or frequent urination
• Blood in urine
• Very dark or unusual-looking urine

A change in urination does not always mean kidney disease, but persistent changes should be assessed.

Swelling Around the Eyes

Puffiness around the eyes, particularly in the morning, can sometimes occur when a child is losing significant amounts of protein through the urine.

Swelling can also have many other causes.

Persistent or unexplained swelling deserves medical evaluation.

Swelling of the Feet or Abdomen

Fluid accumulation can cause swelling of the:

• Feet
• Ankles
• Legs
• Hands
• Face
• Abdomen

Significant or rapidly increasing swelling should not be ignored.

High Blood Pressure

High blood pressure can occur with some childhood kidney disorders.

Because hypertension may produce few obvious symptoms, blood-pressure measurement can be an important part of evaluating children at risk of kidney disease.

Poor Growth

Some children with significant chronic kidney disease may have difficulty gaining height or weight normally.

Poor growth has many possible causes, however, and should not automatically be attributed to kidney disease.

Persistent Tiredness

Children with significant kidney dysfunction may experience fatigue or reduced activity.

Persistent tiredness can also result from anemia, nutritional problems, sleep difficulties, infections and many other conditions.

Can Kidney Problems Affect a Child's Growth?

Yes, significant chronic kidney disease can affect normal growth.

Several factors may contribute, including:

• Reduced appetite
• Nutritional difficulties
• Metabolic disturbances
• Anemia
• Hormonal changes
• Severity and duration of kidney disease

Children with chronic kidney disease may therefore need regular monitoring of height, weight and developmental progress.

Early recognition and appropriate management can help address potentially treatable contributors to poor growth.

What Causes Kidney Problems in Children?

There is no single cause.

Important categories include:

Birth-Related Abnormalities

Structural differences in the kidneys or urinary tract can interfere with normal urine drainage or kidney development.

Genetic Conditions

Some kidney diseases are inherited.

Examples include certain forms of polycystic kidney disease and other hereditary kidney disorders.

Infections

Certain infections can affect the urinary system and, in some circumstances, the kidneys.

Immune-Mediated Diseases

Conditions affecting the body's immune system can damage the kidney's filtering structures.

Kidney Stones

Stones may form because of metabolic abnormalities, dietary factors, low fluid intake, medications, genetic conditions or other causes.

Severe Dehydration

Significant fluid loss can temporarily impair kidney function and may become serious if not corrected.

Medicines and Toxins

Certain medicines or toxic substances can affect kidney function.

Children should not be given medicines or supplements without appropriate medical advice.

How Are Kidney Problems in Kids Diagnosed?

Diagnosis depends on the suspected condition.

A doctor may use several types of evaluation.

Medical History and Physical Examination

The doctor may ask about:

• Urination
• Fever
• Pain
• Swelling
• Previous infections
• Medication use
• Family history
• Growth
• Blood pressure
• Previous kidney problems

Urine Testing

Urinalysis can identify:

• Blood
• Protein
• White blood cells
• Signs of infection
• Other abnormalities

A urine albumin or protein measurement may be recommended in selected situations.

Blood Tests

Depending on the child's symptoms, doctors may evaluate:

• Serum creatinine
• eGFR
• Urea
• Sodium
• Potassium
• Bicarbonate
• Hemoglobin
• Other relevant markers

Kidney-function results in children need to be interpreted using appropriate pediatric considerations.

Ultrasound

Kidney and urinary-tract ultrasound can provide information about:

• Kidney size
• Kidney structure
• Urinary obstruction
• Hydronephrosis
• Certain stones
• Other structural abnormalities

Additional Testing

Some children may require additional investigations, depending on the suspected diagnosis.

These can include specialized urine or blood tests, genetic evaluation, functional imaging or, in selected cases, kidney biopsy.

What Is the Treatment for Kidney Problems in Kids?

There is no universal treatment for childhood kidney disease.

Treatment depends on the diagnosis.

It may involve:

• Antibiotics for appropriate bacterial infections
• Correction of dehydration when clinically appropriate
• Medicines to control blood pressure
• Treatment to reduce abnormal protein loss
• Management of kidney stones
• Treatment of immune-related kidney disease
• Correction of electrolyte abnormalities
• Nutritional support
• Treatment of anemia or mineral abnormalities when present
• Management of urinary obstruction
• Dialysis in severe kidney failure when necessary
• Kidney transplantation for selected children with advanced irreversible kidney failure

Treatment should always be prescribed according to the child's age, size, kidney function and specific diagnosis.

Kidney Problems in Kids and Diet

Nutrition is particularly important during childhood because children need adequate nutrients for growth.

A child with kidney disease should not automatically be placed on a restrictive kidney diet.

Depending on the diagnosis and laboratory findings, a pediatric kidney specialist or renal dietitian may recommend adjustments to:

• Sodium
• Protein
• Potassium
• Phosphorus
• Fluid intake

The nutritional plan should provide sufficient calories and nutrients for healthy development while addressing the child's kidney-related needs.

Should Children With Kidney Problems Drink More Water?

Not every child with kidney disease should simply drink more water.

Adequate hydration is important, but fluid requirements depend on:

• Age
• Body size
• Kidney function
• Weather
• Activity
• Urine output
• Heart health
• Presence of urinary obstruction
• Medical treatment

Children with certain kidney conditions may even require a specific fluid limit.

Parents should follow the fluid recommendations provided by the child's healthcare professional.

Can Kidney Problems in Kids Be Cured?

The answer depends entirely on the underlying condition.

Some childhood kidney problems are temporary or treatable.

For example, kidney function affected by dehydration or certain acute illnesses may recover after appropriate treatment.

Other conditions, particularly congenital, genetic or chronic kidney diseases, may require long-term monitoring and management.

Even when a condition cannot be completely cured, appropriate treatment may help preserve kidney function, support growth and reduce complications.

Can Kidney Problems Cause High Blood Pressure in Children?

Yes.

Kidney disease is one of the medical conditions that can contribute to high blood pressure in children.

Conversely, persistent high blood pressure can also damage the kidneys.

For this reason, blood pressure is an important part of kidney assessment and ongoing follow-up.

Parents should not assume that a child is too young to develop hypertension.

When Can Kidney Problems Become Serious?

Some kidney conditions can worsen rapidly, particularly acute kidney injury, severe infection or urinary obstruction.

Prompt evaluation is especially important when a child develops:

• Very little or no urine
• Severe swelling
• Difficulty breathing
• Persistent vomiting
• Severe weakness or unusual sleepiness
• Blood in urine with worsening symptoms
• High fever with urinary symptoms
• Severe abdominal or flank pain
• Confusion or altered responsiveness

These symptoms can have causes other than kidney disease, but they require urgent medical assessment.

Kidney Problems in Babies and Younger Children

Kidney disorders can sometimes present differently in infants and toddlers because they cannot clearly describe pain or urinary symptoms.

Possible warning signs may include:

• Poor feeding
• Unexplained fever
• Irritability
• Vomiting
• Poor weight gain
• Fewer wet diapers
• Swelling
• Unusual changes in urine

Persistent or unexplained symptoms in a young child should be evaluated by a pediatric healthcare professional.

Family History and Childhood Kidney Disease

A family history can be important when evaluating certain kidney conditions.

Parents should tell the doctor if close relatives have had:

• Inherited kidney disease
• Polycystic kidney disease
• Kidney failure at a young age
• Recurrent kidney stones
• Unexplained kidney problems
• Certain urinary tract abnormalities

Depending on the suspected condition, family screening or genetic counseling may be considered.

How Can Parents Help Protect a Child's Kidney Health?

Parents can support kidney health by:

• Encouraging appropriate fluid intake.
• Avoiding unnecessary medicines and supplements.
• Following prescribed treatment carefully.
• Seeking medical care for persistent urinary symptoms.
• Completing recommended follow-up tests.
• Managing conditions such as diabetes or hypertension when present.
• Encouraging a balanced diet.
• Maintaining regular physical activity appropriate for the child's age.
• Attending follow-up appointments for known kidney conditions.

Children with diagnosed kidney disease may need an individualized plan rather than general health advice alone.

When Should a Child See a Kidney Specialist?

A pediatric kidney evaluation may be considered when a child has:

• Persistent protein in urine
• Repeated blood in urine
• Recurrent urinary infections
• Abnormal kidney-function tests
• Reduced eGFR
• Persistent high blood pressure
• Recurrent kidney stones
• Abnormal kidney imaging
• Unexplained swelling
• Poor growth associated with suspected kidney disease
• Known congenital or inherited kidney abnormalities

The appropriate specialist may depend on the child's age and local availability. A pediatric nephrologist specializes in kidney conditions in children.

Kidney Evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation and management for kidney-related concerns.

Depending on the patient's age, symptoms and diagnosis, care may include:

• Review of urine abnormalities
• Kidney-function assessment
• Creatinine and eGFR evaluation
• Blood-pressure assessment
• Evaluation of recurrent urinary infections
• Kidney-stone assessment
• Review of ultrasound and other imaging
• Management of kidney-related complications
• Long-term monitoring of kidney function
• Coordination with pediatric specialists when required

For children, the treating team can determine whether pediatric nephrology or another pediatric specialty is most appropriate.

Frequently Asked Questions

What are the common kidney problems in kids?

Common childhood kidney problems include urinary tract abnormalities, kidney infections, kidney stones, nephrotic syndrome, glomerular diseases, congenital kidney conditions, acute kidney injury and chronic kidney disease.

What are the first signs of kidney problems in children?

Possible signs include changes in urination, swelling around the eyes or legs, blood or protein in urine, high blood pressure, recurrent urinary infections and unexplained problems with growth. Some children may have no obvious symptoms.

Can a child have kidney disease without symptoms?

Yes. Some kidney conditions may be detected through urine, blood-pressure or kidney-function testing before significant symptoms develop.

Can kidney problems affect a child's growth?

Significant chronic kidney disease can affect growth, appetite and nutrition. Children with chronic kidney disease may need regular monitoring of height and weight.

Are kidney stones possible in children?

Yes. Although less common than in adults, children can develop kidney stones. Recurrent stones may require evaluation for metabolic, dietary, genetic or other contributing factors.

Is protein in a child's urine always kidney disease?

No. Temporary protein in urine can occur in some situations. Persistent or significant proteinuria should be evaluated to determine whether an underlying kidney condition is present.

Can kidney disease in children be treated?

Many childhood kidney conditions can be treated or managed. Some are temporary, while congenital, genetic or chronic disorders may require long-term care.

When is kidney failure treatment needed in a child?

Severe kidney failure may require kidney replacement therapy such as dialysis or, for selected children with irreversible advanced kidney failure, transplantation. The decision depends on kidney function, symptoms, complications and the child's overall condition.

Conclusion

Kidney problems in kids can have many different causes, and the symptoms are not always obvious. Changes in urination, swelling, high blood pressure, recurrent urinary infections, blood or protein in urine, kidney stones and unexplained growth concerns can all warrant medical evaluation depending on the circumstances.

Some childhood kidney conditions are temporary and treatable, while others require long-term monitoring to preserve kidney function and support normal development.

Parents should avoid diagnosing a kidney problem based on a single symptom or relying on home remedies. Appropriate urine tests, blood tests, blood-pressure measurements and imaging can help identify the underlying condition.

If your child has persistent or unexplained kidney-related symptoms or abnormal test results, specialist evaluation can help determine the next steps.

For individualized kidney care, 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. Kidney problems in children can have many causes, and symptoms such as abdominal pain, fever, changes in urination or swelling may occur with conditions unrelated to the kidneys. Children require age-appropriate medical evaluation, and kidney-function tests must be interpreted using appropriate pediatric reference standards. Do not give a child prescription medicines, painkillers, supplements, herbal products or excessive fluids without professional guidance. Seek urgent medical attention if a child has very little or no urine, severe swelling, difficulty breathing, persistent vomiting, severe weakness, confusion, severe flank or abdominal pain, or high fever with concerning urinary symptoms.