Managing Kidney Stones in Children: Causes, Signs, Symptoms, Diagnosis & Treatment Options

Kidney stones in children, though less common than in adults, are becoming increasingly recognized by pediatricians and pediatric urologists. This rise can be attributed to various lifestyle, dietary, and genetic factors. For parents, understanding the causes, symptoms, treatment options, and preventive strategies for pediatric kidney stones is vital in managing the condition and ensuring a child’s long-term health.

What are Kidney Stones? 

Kidney stones are hard deposits made of minerals and salts that form inside the kidneys. In children, these stones can develop when the urine becomes too concentrated with certain substances such as calcium, oxalate, or uric acid that crystallize and stick together.

While kidney stones in children are not as common as in adults, their incidence is on the rise, particularly among adolescents. Risk factors include dehydration, dietary habits, certain medications, metabolic disorders, and a family history of kidney stones.

Obesity: Childhood obesity is a known risk factor for many health issues, including kidney stones. Obesity increases the risk of kidney stones in children by affecting the balance of acids and salts in the urine. Overweight kids may have higher levels of substances like calcium, oxalate, and uric acid, which can lead to stone formation. Maintaining a healthy weight through a balanced diet and regular physical activity is key to reducing this risk.

Family History and Genetics: A child with a family history of kidney stones is more likely to develop them.

Medical Conditions: Certain medical conditions can increase a child’s risk of developing kidney stones. These include urinary tract infections (UTIs), metabolic disorders, hyperparathyroidism, and conditions that affect calcium or oxalate levels in the body. Some genetic disorders or gastrointestinal diseases, like inflammatory bowel disease, can also contribute. Children with these conditions may need regular monitoring and preventive care to avoid kidney stone formation.

Medications: Certain drugs, such as diuretics, antacids, and anti-seizure medications, may increase the risk of kidney stones.

Recognizing the symptoms of kidney stones in children can be challenging, as they may vary based on the child’s age and the stone’s size and location. Some common signs include:

In very young children or infants, symptoms may be more subtle and can include irritability, crying during urination, or changes in urine color.

In case of noticing any unusual symptoms, a parent must be alerted to the possibility of kidney stones in their child and consult a pediatrician or pediatric urologist. 

When a child presents with symptoms suggestive of kidney stones, a pediatrician or pediatric urologist will perform a thorough evaluation to make a diagnosis. This includes:

Early diagnosis is crucial to prevent complications such as kidney damage or recurring infections.

Treatment for kidney stones in children depends on the size, location, and type of stone, as well as the child’s overall health. A pediatric urologist will suggest a specific plan personalised for the child, depending on the condition. Some common approaches for treatment include:

For small stones that are likely to pass naturally a conservative management may be used. 

Many-a-time small kidney stones in children can be managed conservatively without surgery. This approach involves allowing the stone to pass naturally through the urinary tract while keeping the child comfortable and preventing complications.

Key aspects used in a conservative approach are-

Conservative treatment is usually effective for smaller stones and helps avoid the need for invasive procedures. However, close supervision by a pediatric urologist or nephrologist is important.

Medical Expulsive Therapy is a non-surgical treatment that helps children pass small kidney stones more easily. It involves the use of certain medications, often alpha-blockers, that relax the muscles in the urinary tract, allowing the stone to move and pass with less pain.

This therapy is typically used for – 

MET is usually combined with increased fluid intake and regular follow-up. It’s considered safe and effective, but not all children are good candidates. Thus, it should be guided by a pediatric specialist.

Shock Wave Lithotripsy is a non-invasive procedure used to treat kidney stones in children. It uses high-energy sound waves (shock waves) from outside the body to break the stone into smaller pieces, which can then pass naturally in the urine.

SWL is usually recommended for-

It is done under anesthesia and usually requires a short hospital stay. SWL is safe, effective, and causes minimal discomfort.

Ureteroscopy is a minimally invasive procedure used to treat kidney stones that are stuck in the ureter, especially when they don’t pass on their own or cause symptoms like pain or infection. In this procedure, a thin, flexible tube with a camera (ureteroscope) is passed through the urethra and bladder to reach the stone. The doctor can then remove the stone or break it into smaller pieces using a laser. Ureteroscopy is commonly used in children when medications or other non-surgical treatments are not effective. It is done under anesthesia and usually allows the child to go home the same day or after a short hospital stay.

Used for very large or complex stones, this minimally invasive surgical technique involves making a small incision in the back to remove the stone directly from the kidney.

Addressing the underlying causes of kidney stones in children is key to preventing future episodes. This may involve treating medical conditions like urinary tract infections, metabolic disorders, or adjusting the child’s diet and fluid intake. Identifying and managing these root causes helps reduce the risk of recurrence.

Prevention is key in managing kidney stones in children and reducing the likelihood of recurrence. Some effective strategies for prevention that a parent can follow include: 

Encourage Adequate Hydration: Ensure your child drinks enough water throughout the day. As a general rule, children should drink enough fluids to produce at least 1 to 1.5 liters of urine daily, depending on their age and size. This usually means drinking around 1.5 to 2 liters (6–8 glasses) of water per day for school-aged children. Clear or pale-yellow urine is a good sign that they are well hydrated.

Limit Sodium Intake: Reduce the amount of salt in your child’s diet by avoiding processed and fast foods. Excessive pickles, papads, chips, and other salty snacks should also be limited. 

Promote a Balanced Diet: Include fruits, vegetables, and whole grains while limiting animal proteins and oxalate-rich foods like spinach, tomato, beetroot, nuts, and chocolates. 

Regular Physical Activity: Encourage exercise and an active lifestyle to support overall kidney and metabolic health.

Monitor and Manage Medical Conditions: Children with conditions like hypercalciuria or cystinuria may need special diets or medications as prescribed by their healthcare provider.

Follow-Up Care: Regular follow-ups with a pediatric nephrologist or urologist can help monitor your child’s condition and prevent future stones.

Immediate medical attention should be sought if your child:

Delaying care can lead to complications, including infections, kidney damage, or recurrent stone formation.

Kidney stones in children can be a painful and concerning condition, but with early diagnosis, effective pediatric kidney stone treatment, and proactive preventive care, most children recover well and lead healthy lives. Understanding the causes, recognizing child kidney stone symptoms, and taking steps toward preventing kidney stones in kids can make all the difference in your child’s kidney health journey.

If you suspect your child may have kidney stones or if there’s a family history of the condition, consult a pediatrician or pediatric nephrologist for guidance and support.