Can Kidney Stones Go Away On Their Own?

Yes, but it depends primarily on size. Kidney stones smaller than 5 millimeters typically pass on their own without medical intervention, while stones 5mm or larger rarely pass naturally and often require treatment.

Key Takeaways:

• Stones under 5mm: Pass naturally in about 80% of cases within 4 weeks
• Stones 5-10mm: May pass with medication (tamsulosin/Flomax) in 2-4 weeks
• Stones over 10mm: Almost always require surgical intervention
• Seek immediate care if pain becomes unmanageable or if you develop a fever with a stone
• Surgery becomes necessary after 6 weeks without a natural passage to prevent kidney damage

Understanding whether your kidney stone can pass naturally helps you decide between conservative management and medical intervention. Stone size is the most critical factor determining your treatment path.

This guide explains exactly when kidney stones pass naturally, what symptoms to expect during passage, when medication can help, and which surgical options work best for stones that won’t pass on their own. You’ll learn the specific size thresholds that determine treatment, warning signs that require immediate medical attention, and what to expect from each treatment option available with board-certified urologists at Modern Urology.

Can Kidney Stones Pass Naturally?

Kidney stones are a common urological condition that affects millions of people each year, with board-certified urologists treating hundreds of these cases annually. Understanding when these mineral deposits can pass naturally helps you make informed decisions about treatment. According to the National Institute of Diabetes and Digestive and Kidney Diseases, the size of kidney stones plays a crucial role in determining whether medical intervention is necessary.

Larger Kidney Stones That Need Medical Attention

Kidney stones measuring 5 millimeters or larger rarely pass without medical intervention. These larger stones often become lodged in the urinary tract as they travel downward. The resulting pain can be severe and may require strong pain medication initially. As kidney stones continue their descent through the urinary tract, NSAIDs help manage ongoing discomfort. Increasing water intake significantly aids in moving these stones through your system. Your urologist may recommend at-home monitoring while you wait for the stones to pass naturally. However, severe pain often necessitates hospital admission for proper pain management. Intravenous fluids administered during hospitalization help improve hydration and facilitate stone passage. Medical supervision ensures your safety throughout this uncomfortable process.

When to Seek Immediate Medical Care

You should contact your urologist if pain becomes unmanageable at home. Hospitalization provides controlled pain relief and proper hydration support. IV fluids boost your body’s ability to flush out kidney stones more effectively. Professional monitoring by specialized urology teams helps prevent complications during the stone passage process.

Medical Treatment Options for Medium-Sized Stones

Kidney stones between 5 and 10 millimeters present unique challenges but remain manageable. These stones have a reasonable probability of passing naturally with proper treatment. Your urologist may prescribe tamsulosin, commonly known by its brand name Flomax. This alpha-blocker medication works by relaxing the distal ureter muscles. The distal ureter connects directly to your bladder and controls urine flow. Relaxed ureter muscles create a wider pathway for kidney stones to pass through. Patients typically experience stone passage within 2 to 4 weeks of starting medication. Tamsulosin also reduces discomfort associated with moving stones significantly. This medication is well-tolerated by most patients with minimal side effects. Taking tamsulosin increases your chances of passing stones without surgical intervention, particularly benefiting both men and women experiencing kidney stones.

Benefits of Medication-Assisted Stone Passage

• Allows you to manage the condition from home comfortably
• Reduces the need for invasive surgical procedures
• Provides relief from pain associated with kidney stones
• Increases the likelihood of natural stone passage

While medication does not guarantee complete stone passage, it remains highly effective. As long as pain levels stay manageable, medication offers an excellent first-line treatment. Surgical procedures become necessary only when conservative treatment fails or complications arise. Your urologist will monitor your progress and adjust treatment as needed.

When Should You Consider Surgical Treatment?

Surgery becomes necessary when kidney stones don’t pass naturally within six weeks. Timely surgical removal prevents serious complications from developing. One major concern is ureter blockage, which occurs when stones obstruct the urinary pathway. This blockage can lead to severe pain and difficulty urinating. You may notice blood in your urine or changes in urine output. Without treatment, blocked urine flow causes recurring urinary tract infections. The condition can also lead to hydronephrosis, where the kidneys swell with trapped fluid. Permanent kidney damage may result if the obstruction remains untreated for extended periods, according to research published in peer-reviewed urology journals.

When stones occur with urinary tract infections, life-threatening sepsis can develop rapidly. Medical professionals may place a drainage tube in your ureter or kidney. This catheter removes infected urine and prevents further complications. Early intervention protects your kidney function and overall health, as emphasized by urinary health experts at Harvard Medical School.

Available Surgical Treatment Options

Modern urology offers several effective procedures for removing problematic stones. Each treatment targets specific stone sizes and locations. Your urologist recommends the best approach based on your individual situation.

Shock Wave Lithotripsy

This minimally invasive outpatient procedure uses targeted sound waves to break stones. No surgical cuts are required for this treatment. Doctors use imaging technology to locate and target the stone precisely. The procedure takes approximately two hours under general anesthesia. Sound waves hit the stone repeatedly until it fragments into smaller pieces. These tiny fragments pass naturally through your urine with minimal discomfort. This approach works best for stones measuring 2 centimeters or smaller. The procedure is particularly effective for stones located higher in the kidney, as noted by Cleveland Clinic urologists.

Key Benefits:

• No incisions or surgical wounds
• Quick outpatient recovery time
• Minimal post-procedure discomfort
• Effective for appropriately sized stones

Ureteroscopy

Stones measuring 1.0 to 1.5 centimeters respond well to ureteroscopy. This minimally invasive procedure uses a small lighted camera tube. The ureteroscope enters through your urethra and travels to the affected area. It moves through the bladder and continues up into the ureter. A laser device passes through the scope to fragment the stone. Doctors remove stone pieces using specialized baskets or tubes. Some patients receive a temporary stent to aid healing. The entire procedure is performed on an outpatient basis, similar to other diagnostic cystoscopy procedures.

Treatment Features:

• Camera-guided precision
• Laser fragmentation technology
• Same-day discharge possible
• Minimal recovery time required

Percutaneous Nephrolithotomy and Nephrolithotripsy

Larger stones exceeding 2 centimeters require more direct surgical access. The urologist creates a small incision in your back. This opening provides a pathway directly to the affected kidney. A nephroscope tube carries surgical instruments and a camera to the stone. Nephrolithotomy involves physically removing the intact or fragmented stone. Nephrolithotripsy focuses on breaking the stone into removable pieces. Ultrasonic or laser devices vibrate at high frequencies to fragment stones. Suction removes all stone fragments through the surgical tube. A temporary stent may be placed to manage swelling and support healing, particularly beneficial for patients who also experience bladder leakage issues.

Procedure Advantages:

• Effective for large stones
• Direct access to the treatment site
• Complete stone removal is possible
• A single procedure is often sufficient

Robotic Assisted Laparoscopic Nephrolithotomy

Complex cases benefit from advanced robotic surgical techniques. Small abdominal incisions allow insertion of specialized laparoscopic instruments. The surgeon controls robotic tools from a computer console. This technology provides enhanced precision and visualization during surgery. The kidney is carefully accessed and opened to extract the stone. Robotic assistance allows for greater dexterity in challenging anatomical situations. This approach suits patients with particularly large or difficult-to-reach stones, representing the cutting-edge technology available at facilities like Johns Hopkins Brady Urology Institute.

Advanced Technology Benefits:

• Enhanced surgical precision
• Smaller incisions than traditional surgery
• Reduced tissue trauma
• Faster healing process

Urological specialists assess each case individually to determine optimal treatment. Comprehensive evaluation considers stone size, location, and patient health factors. Treatment plans prioritize effective stone removal while minimizing risks. Early consultation with urology professionals specializing in kidney stones prevents complications and preserves kidney function. The American Urological Association provides evidence-based guidelines that inform treatment decisions, while ongoing research documented in medical literature databases continues to improve outcomes for patients dealing with stress urinary incontinence and other urological conditions following kidney stone procedures.

Conclusion

Kidney stone passage depends primarily on size, with stones under 5mm passing naturally in 80% of cases within four weeks. Stones between 5-10mm may pass with medication assistance like tamsulosin, while stones exceeding 10mm almost always require surgical intervention. The key to successful management is understanding when conservative treatment is appropriate and when medical intervention becomes necessary.

Don’t wait beyond six weeks without stone passage, as prolonged blockage can cause permanent kidney damage, recurring infections, and hydronephrosis. Modern surgical options, from shock wave lithotripsy to robotic-assisted procedures, offer safe, effective solutions for stones that won’t pass naturally. If you’re experiencing unmanageable pain, fever, blood in urine, or difficulty urinating, seek immediate medical attention. Early consultation with a urologist at Modern Urology ensures proper treatment selection, prevents complications, and preserves kidney function. For additional information on kidney disease prevention and management, consult resources from the National Kidney Disease Education Program. Your stone size and symptoms determine the most appropriate treatment path forward, whether through advanced bladder treatments or innovative nerve stimulation therapies that support overall urological health. The Mayo Clinic’s urology department emphasizes that timely intervention remains the cornerstone of preventing long-term kidney complications.

FAQs

How long does it take for a kidney stone to pass naturally?

Most kidney stones under 5mm pass within 2-4 weeks naturally. The exact timeframe depends on stone size, location in the urinary tract, and your hydration level. Stones positioned lower in the ureter typically pass faster than those higher up near the kidney. Drinking 2-3 liters of water daily significantly speeds the passage process. If your stone hasn’t passed after 6 weeks, contact your urologist to discuss treatment options and prevent kidney damage.

What does it feel like when a kidney stone is passing?

Kidney stone passage causes intense, cramping pain that comes in waves, typically felt in your back, side, lower abdomen, or groin. The pain often shifts location as the stone moves through your urinary tract. You may experience painful urination, an urgent need to urinate frequently, nausea, vomiting, and blood in your urine. Pain intensity varies based on stone size and location; smaller stones may cause minimal discomfort while larger ones create severe, debilitating pain requiring medical management.

Can drinking water dissolve kidney stones?

Water cannot dissolve existing kidney stones, but it significantly aids in passing them naturally. Drinking 2-3 liters of water daily dilutes urine, reduces stone formation risk, and helps flush smaller stones through your urinary system. Increased hydration makes urine less concentrated, preventing minerals from crystallizing into new stones. While water alone won’t break down formed stones, proper hydration is essential for both treatment and prevention of future kidney stones.

What are the warning signs that a kidney stone requires emergency care?

Seek immediate medical attention if you experience a fever above 101°F with kidney stone pain, as this indicates possible infection requiring urgent treatment. Severe, uncontrollable pain despite over-the-counter medication, inability to urinate or significantly reduced urine output, heavy blood in urine, persistent vomiting preventing fluid intake, and pain accompanied by chills all require emergency evaluation. These symptoms may indicate serious complications like urinary tract obstruction, infection, or sepsis that demand immediate medical intervention.

How can I prevent kidney stones from coming back?

Drink at least 2-3 liters of water daily to keep urine diluted and prevent mineral crystallization. Reduce sodium intake to less than 2,300mg per day, as excess salt increases calcium in urine. Limit animal protein from red meat, poultry, and seafood, which elevates uric acid levels. Consume adequate dietary calcium (1,000-1,200mg daily) from food sources, as low calcium diets actually increase stone risk. Your doctor may recommend specific dietary changes based on your stone composition analysis from previously passed stones.