Kidney stone pain is some of the most intense pain a person can experience. The pain comes in waves as the stone moves through your urinary tract. Most acute pain episodes last between 20 and 60 minutes, but the entire process of passing a stone can take days or even weeks. The total duration depends on the stone’s size, location, and whether it gets stuck.
How Long Does The Pain Last With Kidney Stones?
An individual pain wave, often called renal colic, typically lasts 20 to 60 minutes. These waves repeat as the ureter spasms around the stone. The full course of pain from first symptom to stone passage usually spans 1 to 3 weeks for stones small enough to pass without medical intervention.
Stones smaller than 5 millimeters pass on their own about 90 percent of the time. These often clear within 1 to 2 weeks. Stones between 5 and 10 millimeters may take up to 4 to 6 weeks to pass, and the pain can come and go during that entire period. Stones larger than 10 millimeters rarely pass without procedures.
This timeline is not a guarantee. Some people pass a small stone in a few days. Others experience intermittent pain for over a month. The pain stops permanently only when the stone reaches the bladder or is removed.
Why Kidney Stone Pain Comes In Waves
The ureter is a narrow muscular tube connecting the kidney to the bladder. Its typical inner diameter is about 3 to 4 millimeters. When a stone enters this tube, the walls stretch and the muscle contracts forcefully trying to push it downward.
These contractions cause the classic wave-like pain pattern. Between contractions, the muscle relaxes and pain temporarily eases. This is why the pain feels like it comes and goes rather than remaining constant.
Once the stone drops into the bladder, the intense flank pain usually stops. Passing the stone through the urethra is often painless or causes only mild burning. The severe pain is a ureter problem, not a bladder or urethra problem.
Where The Stone Gets Stuck Changes The Pain Duration
Stones do not always move smoothly. Three narrow points along the ureter commonly trap stones and prolong the pain.
- The ureteropelvic junction: Where the ureter meets the kidney. Stones stuck here cause prolonged flank and back pain.
- The pelvic brim: Where the ureter crosses the iliac vessels near the hip. Pain here often radiates into the lower abdomen or groin.
- The ureterovesical junction: Where the ureter enters the bladder. This is the narrowest point. Stones stuck here cause frequent urination, urgency, and pain that radiates to the tip of the penis or labia.
A stone that moves past all three points usually reaches the bladder and ends the severe pain. A stone that lodges at any of these points can cause pain for weeks until it moves or is treated.
When Kidney Stone Pain Requires Immediate Medical Care
Severe pain alone is a reason to seek emergency care, especially if you have never had a kidney stone before. The pain is often indistinguishable from other serious conditions like appendicitis, a ruptured abdominal aortic aneurysm, or an ectopic pregnancy in women.
Certain symptoms demand urgent evaluation regardless of how long the pain has lasted:
- Fever or chills, which may indicate an infected kidney or urinary tract infection
- Inability to pass urine
- Blood in the urine that is heavy or persistent
- Nausea and vomiting that prevents keeping down fluids
- Pain so severe you cannot sit still or find a comfortable position
Fever with a kidney stone is a medical emergency. An obstructed infected kidney can progress to sepsis within hours. Do not wait this out at home.
How Long Does Pain Last After Treatment
Many stones require procedures to remove or break apart. The pain after these procedures differs from the stone pain itself.
After shock wave lithotripsy, which uses sound waves to break the stone into fragments, most people feel soreness in the flank for a few days. Passing the fragments can cause mild discomfort for 2 to 4 weeks. The severe colicky pain usually stops once the stone is fragmented because the large obstructing mass is gone.
After ureteroscopy, where a scope is passed into the ureter to remove the stone, a stent is often left in place for several days. The stent itself can cause bladder spasms, flank discomfort, and frequent urination. These symptoms typically resolve within 1 to 3 days after the stent is removed.
After percutaneous nephrolithotomy, used for very large stones, recovery pain can last 1 to 2 weeks. This is surgical pain from the incision, not stone pain.
Pain Relief Options And What Actually Works
Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen are the first-line treatment for kidney stone pain. They reduce inflammation in the ureter and decrease the pressure that drives the pain. NSAIDs are often more effective than opioids for renal colic because they target the underlying mechanism.
Alpha-blockers like tamsulosin are sometimes prescribed to relax the ureter. This can help stones pass faster and with less pain. The evidence is strongest for stones in the lower ureter near the bladder. Some studies show these medications increase passage rates and shorten time to passage by several days.
Drinking water does not directly stop the pain, but adequate hydration supports urine flow. Pain relief medications work best when taken at the first sign of a wave rather than waiting until the pain peaks.
Heat applied to the flank area may provide comfort but does not treat the cause. Deep breathing and position changes rarely help because the pain is driven by internal muscle spasm, not external pressure.
Why The Pain Can Return Even After It Stops
Pain that disappears for a day or two does not mean the stone is gone. The stone may simply be resting in a wider section of the ureter. When it moves again into a narrow segment, the pain returns.
This intermittent pattern is common and often confuses people. They believe the stone passed because the pain stopped. The only way to confirm passage is to strain your urine and catch the stone, or to have imaging that shows no stone remains.
If pain stops completely and does not return for several weeks, the stone likely passed. If pain returns after a pain-free interval, the stone is still moving through the ureter.
How To Tell If You Have Passed The Stone
Straining urine through a fine mesh or coffee filter is the standard way to catch a passed stone. The stone may look like a small grain of sand or a tiny pebble. Its color ranges from yellow to brown to dark red depending on its composition.
Many stones pass during urination without being noticed. The cessation of severe pain, combined with no return of symptoms for 2 weeks, is a reasonable indicator that passage occurred.
If you have imaging scheduled to check on the stone, keep that appointment even if the pain has stopped. Imaging is the only definitive way to confirm the stone is gone.
How Long Does The Pain Last For Large Stones
Stones larger than 10 millimeters rarely pass spontaneously. The pain from these stones does not resolve until the stone is treated. Waiting for such a stone to pass on its own is not recommended because it can cause permanent kidney damage from prolonged obstruction.
Stones that completely block the ureter cause urine to back up into the kidney. This hydronephrosis can damage kidney tissue within weeks. A completely obstructing stone may cause continuous dull pain rather than the classic waves, or it may cause surprisingly little pain while silently damaging the kidney.
This is why the duration of pain is not the only factor that matters. A stone that causes pain for only a few days can still be dangerous if it is completely blocking urine flow. Imaging studies evaluate both the stone and whether the kidney is obstructed.
Frequently Asked Questions
Can kidney stone pain last for months?
Yes, but this is uncommon and usually means the stone is too large to pass or is lodged in a narrow section of the ureter. Intermittent pain over several months warrants imaging and urology referral rather than continued waiting.
Does kidney stone pain stop when the stone reaches the bladder?
Yes, the severe colicky pain typically stops once the stone enters the bladder because the ureter stops spasming. Passing the stone from the bladder through the urethra usually causes only mild discomfort.
How long should I wait before going to the ER for kidney stone pain?
Go immediately if you have fever, chills, vomiting, or cannot pass urine. For severe pain without these symptoms, seek emergency care within hours because the pain indicates obstruction that needs evaluation.
Is it normal for kidney stone pain to come and go for weeks?
Yes, this pattern is common for stones that are slowly moving through the ureter. Pain-free intervals can last days, but the pain returns when the stone moves again into a narrow area.
