What are the first signs of a kidney stone?

Sudden, sharp flank or back pain — often radiating toward the groin — is the most common first sign, sometimes accompanied by blood in the urine or nausea.

Do all kidney stones need surgery?

No. Small stones often pass on their own with hydration and pain relief. Whether surgery is needed depends on stone size, location, and how it’s responding to conservative management.

Can kidney stones come back after treatment?

Yes, recurrence is common without preventive measures. Adequate hydration and dietary changes meaningfully reduce the risk of forming new stones after treatment.

Is kidney stone pain always severe?

Not always — small stones can sometimes cause mild symptoms or none at all, particularly if they aren’t currently causing a blockage.

Kidney Stone Treatment: Symptoms, Causes & Options

Creator: Dr. Raju R
Published: 2026-07-27T05:18:04.714Z

What Is a Kidney Stone?

A kidney stone is a hard deposit of minerals and salts that forms inside the kidney when urine becomes concentrated, allowing crystals to stick together. Most stones are made of calcium oxalate, though uric acid, struvite, and cystine stones also occur. Stone size varies widely — some pass unnoticed, while others grow large enough to block the flow of urine.

Common Symptoms to Watch For

Sudden, sharp pain in the flank or back that may radiate toward the groin
Pain that comes in waves as the stone moves through the urinary tract
Blood in the urine (visible or detected only on testing)
Nausea and vomiting alongside the pain
A burning sensation or increased urgency when urinating
Cloudy or foul-smelling urine

Seek same-day care if stone pain comes with fever, chills, or vomiting — this combination can mean the kidney is infected and obstructed, which is a urological emergency.

What Causes Kidney Stones?

Low fluid intake is the single biggest risk factor, since concentrated urine gives minerals more opportunity to crystallize. Diets high in salt, animal protein, or oxalate-rich foods, along with obesity, a family history of stones, and certain metabolic conditions, also raise the risk.

When to See a Urologist

Most stone pain warrants a same-week evaluation, but some situations need urgent attention: fever or chills alongside pain (which can signal an infected, obstructed kidney), complete inability to urinate, uncontrollable pain or vomiting, or a blockage affecting a single functioning kidney.

How Kidney Stones Are Diagnosed

Diagnosis typically involves a urine test, blood test, and imaging — usually an ultrasound or a non-contrast CT scan of the kidneys, ureters and bladder (CT KUB), which is the most reliable way to confirm a stone's size and exact location.

Treatment Options

Small stones, generally under 5–6 mm, often pass on their own with increased fluids and pain relief. Larger or obstructing stones typically need active treatment: ESWL (extracorporeal shock wave lithotripsy) uses focused shock waves to fragment stones from outside the body; RIRS (retrograde intrarenal surgery) uses a flexible scope and laser passed through the urinary tract to break up stones without any incision; and PCNL (percutaneous nephrolithotomy) is used for larger or complex stones, accessing the kidney through a small port in the back. The right option depends on stone size, location, and composition.

When Is Surgery Needed?

Surgery isn’t the default for every stone — most small stones are managed conservatively first. The decision to move to active treatment (ESWL, RIRS, or PCNL) rather than continuing to wait or manage with medication comes down to a few specific factors:

Stone size — stones above roughly 6–7 mm are unlikely to pass on their own and are generally treated actively rather than observed indefinitely
A stone that hasn’t moved or passed after a reasonable trial of fluids, pain relief, and medical expulsion therapy (commonly tamsulosin)
Persistent blockage — if imaging shows the kidney is still obstructed after several weeks of conservative management
Infection with an obstructed kidney — this needs urgent drainage first (often a stent or nephrostomy tube) and is treated as an emergency, not managed with watchful waiting
A stone blocking a single functioning kidney, where any delay carries a higher risk to overall kidney function
Declining kidney function on blood tests, attributable to the blockage
Pain that isn’t controlled by medication, or repeated emergency visits for the same stone

None of these on their own automatically mean immediate surgery — they’re the factors Dr. Raju R weighs together, alongside stone size, location, and composition, to decide whether continued observation or active treatment is the safer path.

When surgery is the right call, the choice between ESWL, RIRS, and PCNL still depends on the same stone size, location, and composition factors already covered above — surgery being “needed” determines whether to treat, not automatically which procedure to use.

Preventing Future Stones

Drink enough water to keep urine consistently pale in color
Moderate salt and animal protein intake
Limit oxalate-rich foods if you're a recurrent stone former
Ask about a metabolic evaluation if you've had more than one stone

When to Consult Dr. Raju R

If you're experiencing flank pain, blood in your urine, or have been told you have a kidney stone, timely evaluation helps avoid complications like infection or kidney damage. Dr. Raju R offers the full range of stone treatments — from ESWL to RIRS and PCNL — at Genesiss Multi-Speciality Hospital, Bangalore.