Kidney stones are hard mineral-salt crystals that bulge from inside the kidneys. Some pass out on their own naturally without problem, whereas some stones are large enough to cause intense pain, and in some cases may require medical intervention to be treated. But patients often ask, “How long does it take to pass kidney stones?”
The answer can be affected by a number of factors, like the stone’s size, its location, and your general health.
What Are Kidney Stones?
Kidney stones form when trace amounts of some substances in the urine like calcium, oxalate, and uric acid, become trapped and crystallize. Over time these crystals may grow into stones, which may differ in size. Small stones often pass through the urinary tract without issue; larger stones can become lodged in the ducts and cause pain.
How Long Does It Take to Pass a Kidney Stone?
It depends on each patient.
In General:
- Small (under 4 mm) stones most pass within about 31 days.
- Medium (4-6 mm) stones can take longer, up to 45 days or more, and may need medical help.
- Large (over 6 mm) stones rarely pass on their own and usually need treatment.
Several studies suggest that many of the stones which will generally pass naturally do so within a few weeks, although some may take months depending on size and location.
Factors Affecting How Long It Takes to Pass a Kidney Stone
1. Stone Size
The size of the stone is the most important factor affecting how quickly it passes. Smaller stones move along the urinary tract more easily than large stones. Stones larger than 6 mm are more likely to become trapped in the ureter and are unlikely to pass on their own.
2. Stone Proximity
Stones that have entered the bladder more than those that remain in the kidney are more likely to pass quickly. Stones that are further down will more likely pass.
3. Hydration
Increasing fluid intake may speed the passage of small stones. This is often recommended by health professionals when appropriate.
Symptoms as Storing a Kidney Stone
When a kidney stone is passing through the urinary tract, you may have:
- Sharp pain in the back, side, lower abdomen or groin
- Pain when passing urine
- Blood in the urine
- Draining to pass urine more than usual
- Nausea and vomiting
- Pain that is in waves or fluctuates in intensity
It may worsen as the stone passes from the kidney into the ureter.
When Should You See a Doctor?
Not all kidney stones will pass on their own. But if you’re experiencing:
- Severe or overwhelming pain
- Fever or chills
- Continued vomiting
- Suffering to pass urine
- Blood in the urine worsening
The symptoms there for several weeks, you should seek medical attention
What I Can Do To Pass Kidney Stone?
Your doctor can suggest you:
- Drink plenty of fluids
- Take the prescribed pain medication
- Take medications to relax the ureter
- Follow the progress with imaging studies
If you are dealing with kidney stone symptoms, it is important to seek professional medical evaluation to avoid complications and preserve your kidney health. The urology specialists at Magnet Health have extensive experience in the diagnosis, treatment, and long-term management of kidney stones and other urinary tract conditions. If you need a medical management, advanced imaging, or specialized care, Magnet Health’s dedicated team can help you move swiftly toward relief.
Conclusion
So how long does it take to pass kidney stones? Here’s the answer. It depends on the size and location of the stone. Small stones may pass in a few weeks. The larger, the longer. In some cases, stone passage can take over a month or necessitate medical treatment. If your symptoms are severe or prolonged, don’t wait see your doctor and be sure you receive the proper diagnosis and treatment.