Kidney Stones: Why They Keep Coming Back and How to Prevent Them

August 17, 2026

Kidney stones are one of the most painful urological conditions, affecting millions of people worldwide. While modern treatments can remove stones effectively, many patients are surprised to find themselves facing the same problem again just a few years later.

If you have had a kidney stone once, your chances of developing another are significantly higher unless the underlying causes are identified and addressed. Fortunately, with the right lifestyle changes, dietary modifications and timely medical care, most recurrent kidney stones can be prevented.

What are Kidney Stones?

Kidney stones are hard deposits made of minerals and salts that form inside the kidneys. They develop when urine contains high levels of substances such as calcium, oxalate or uric acid and not enough fluid to dissolve them. Over time, these minerals crystallise and gradually grow into stones.

Kidney stones vary in size. Some are tiny enough to pass through the urinary tract without causing symptoms, while others can become large enough to block the flow of urine and cause severe pain.

Why do kidney stones keep coming back?

Treating a kidney stone removes the stone—but not necessarily the reason it formed. Unless the underlying risk factors are corrected, new stones can develop. Some of the most common reasons for recurrence include:

Dehydration: Not drinking enough water is the leading cause of kidney stones. When the body is dehydrated, urine becomes concentrated, making it easier for minerals to crystallise. This is particularly relevant in North Bengal, where high temperatures and humidity during much of the year can lead to increased sweating and fluid loss.

Excess salt in the diet: A diet high in sodium increases the amount of calcium excreted in the urine, making calcium stones more likely to form. Hidden sources of salt include packaged snacks, pickles, processed foods, instant noodles, sauces and restaurant meals.

Too much animal protein: Frequent consumption of red meat, organ meat and seafood can increase uric acid levels while reducing citrate—a natural substance in urine that helps prevent stone formation.

Foods rich in oxalates: Many kidney stones are made of calcium oxalate. Foods such as spinach, beetroot, nuts, chocolate and tea are naturally high in oxalates. These foods are healthy and do not need to be completely avoided, but people with recurrent calcium oxalate stones may need to consume them in moderation under medical guidance.

Obesity and lifestyle factors: Being overweight, having diabetes or leading a sedentary lifestyle can increase the risk of kidney stones by altering the composition of urine.

Family history: If a close family member has had kidney stones, your own risk is higher because of inherited metabolic tendencies.

Medical Conditions: Recurring urinary tract infections, gout, hyperparathyroidism, inflammatory bowel disease and certain digestive disorders may also increase the likelihood of stone formation.

What are the symptoms of kidney stones?

Many small stones may not cause symptoms until they begin moving through the urinary tract. If you experience severe pain along with fever or difficulty passing urine, seek immediate medical attention.

Common warning signs include:

Severe pain in the back, side or lower abdomen
Pain that comes in waves and changes in intensity
Blood in the urine
Burning sensation while passing urine
Frequent urge to urinate
Cloudy or foul-smelling urine
Nausea and vomiting
Fever and chills if an infection is present

How can you prevent kidney stones?

The good news is that most kidney stones are preventable.

Stay well hydrated

Drinking enough water is the single most effective way to prevent kidney stones. Aim for around 2.5 to 3 litres of fluids every day, or enough to produce pale yellow urine. During hot weather, physical activity or excessive sweating, your fluid intake should be even higher.

Reduce salt intake

Try to limit your daily salt consumption by:

Avoiding processed and packaged foods
Cutting down on pickles and salty snacks
Reading nutrition labels carefully
Using herbs and spices instead of extra salt for flavour

Eat a balanced diet

A diet rich in fruits, vegetables, whole grains and adequate dietary calcium supports kidney health. Contrary to popular belief, most people should not stop consuming milk and dairy products. Normal dietary calcium actually helps reduce the absorption of oxalates in the intestine, lowering the risk of certain kidney stones.

Limit sugary drinks

Soft drinks and beverages high in added sugar may increase the risk of kidney stones. Water, coconut water and fresh lemon water (without excess sugar) are healthier choices.

Moderate animal protein

You don’t necessarily need to eliminate meat, but moderation is important. Replacing some animal protein with plant-based protein sources can help reduce your risk.

Maintain a healthy weight

Regular exercise and maintaining a healthy body weight improve overall metabolism and reduce the likelihood of stone formation.

Don’t ignore recurrent urinary infections

Some kidney stones develop because of repeated urinary tract infections. Early diagnosis and complete treatment of infections can help prevent these stones.

Why identifying the stone type matters

All kidney stones are not the same, and knowing the stone’s composition helps your doctor recommend specific dietary changes, medications and preventive strategies. Patients with recurrent stones may also undergo blood tests and a 24-hour urine analysis to identify metabolic abnormalities that increase stone risk.

Stones may be composed of:

Calcium oxalate
Calcium phosphate
Uric acid
Struvite
Cystine

How are kidney stones treated?

Treatment depends on the size, location and type of stone. Small stones often pass naturally with adequate hydration and medication. Modern minimally invasive techniques allow faster recovery, lesser pain and shorter hospital stays compared to traditional surgery.

Larger stones or those causing obstruction may require advanced procedures such as:

Shock Wave Lithotripsy (ESWL): Uses sound waves to break stones into smaller fragments
Ureteroscopy (URS): A thin telescope is passed through the urinary tract to remove or fragment stones using a laser
Percutaneous Nephrolithotomy (PCNL): A minimally invasive procedure used to remove large or complex kidney stones through a small incision in the back.
Advanced Endoscopic and Laser Procedures: Suitable for selected patients with complex stones.

When Should You See a Doctor?

Early evaluation can prevent complications such as kidney damage, infection and recurrent stone formation. Consult a urologist if you have:

Severe or recurrent pain in the back or side
Blood in the urine
Repeated urinary tract infections
A history of kidney stones
Difficulty passing urine
Fever associated with urinary symptoms

Expert Opinion

“Kidney stones often recur if the root cause is not addressed. Dehydration, unhealthy dietary habits, obesity, and certain medical conditions are common reasons for repeated stone formation. Staying well-hydrated, reducing salt intake, maintaining a balanced diet, and undergoing regular health check-ups can significantly lower the risk. Early evaluation and personalized preventive care are key to protecting long-term kidney health and preventing future episodes.”

-Consultant Urologist
-Desun Hospital, Siliguri

Expert kidney stone care at Desun Hospital Siliguri

At Desun Hospital Siliguri, our experienced Urology team provides comprehensive diagnosis and treatment for kidney stones using advanced imaging and minimally invasive procedures. From emergency management of painful stones to personalised prevention plans for recurrent stone formers, we offer complete care under one roof. Our specialists also guide patients on dietary modifications, hydration strategies and long-term lifestyle changes that help reduce the risk of future kidney stones and protect kidney health.

Having one kidney stone does not mean you are destined to suffer from them forever. Most recurrent stones can be prevented through adequate hydration, healthy eating habits, weight management and regular follow-up with a urologist.

If you have experienced kidney stones before, don’t wait for another painful attack. A preventive evaluation today can save you from serious discomfort tomorrow. Your kidneys work tirelessly every day. Taking care of them today can help keep kidney stones away for years to come.

Frequently Asked Questions (FAQs)

Why do kidney stones come back?

Kidney stones often recur because the underlying causes, such as dehydration, high salt intake, dietary habits, obesity, metabolic disorders, or certain medical conditions, remain unaddressed. Without preventive measures, many people experience another stone within a few years.

How much water should I drink to prevent kidney stones?

Most adults should drink enough fluids to produce at least 2 to 2.5 litres of urine daily. This usually means consuming around 2.5 to 3 litres of fluids each day, and even more during hot weather or physical activity.

What foods should I avoid if I have kidney stones?

Dietary advice should always be personalised based on the type of kidney stone. Depending on the type of stone, your doctor may advise limiting:

Excess salt
Processed foods
Red meat
Sugary drinks
Foods high in oxalates, such as spinach, beetroot, nuts and chocolate

Does drinking lemon water help prevent kidney stones?

Citrus fruits, including lemons, contain citrate, which may help reduce the formation of certain types of kidney stones. However, lemon water should complement, but not replace medical advice, adequate hydration and a healthy diet.

Should I stop drinking milk if I have kidney stones?

No. Most people should continue consuming normal amounts of dietary calcium. In fact, calcium from food can help reduce the absorption of oxalates and lower the risk of certain kidney stones. Avoid calcium supplements unless recommended by your doctor.

What are the warning signs of kidney stones?

Seek immediate medical attention if severe pain is accompanied by fever. Common symptoms include:

Severe pain in the side or back
Pain while urinating
Blood in the urine
Frequent urge to urinate
Nausea or vomiting
Fever and chills, especially if an infection is present

Can kidney stones be treated without surgery?

Yes. Small stones often pass naturally with medication, hydration and pain management. Larger stones or those causing complications may require procedures such as shock wave lithotripsy (ESWL), ureteroscopy or PCNL.

When should I consult a urologist?

You should consult a urologist if you experience severe pain, blood in the urine, repeated urinary infections, fever with urinary symptoms, or if you have had kidney stones in the past and want to prevent recurrence.