Medical Articles · 6 min read
How to Prevent Recurrent Kidney Stones
In brief
The most effective way to prevent kidney stones coming back is to drink enough fluid to produce at least about 2.5 litres of urine a day, reduce salt, keep a normal calcium intake and moderate animal protein. People at higher risk benefit from stone analysis and urine tests that guide targeted diet changes or medication.
Medically reviewed by Dr. Atip Chatsudthipong, MD on
Written by Editorial teamPublished Updated
Why do kidney stones come back?
Treatment removes the stone, but not the conditions that formed it. Without preventive measures, many people develop another stone in the following years. Hot climates such as Thailand's increase the risk because fluid lost through sweating concentrates the urine.
What everyday measures help prevent stones?
| Measure | What to do | Why it helps |
|---|---|---|
| Fluids | Enough to produce about 2.5 L of urine a day — more in heat or with exercise | Dilutes the substances that crystallise |
| Salt | Limit processed and salty foods | High sodium increases calcium in the urine |
| Calcium | Keep a normal dietary intake — do not cut it out | Dietary calcium binds oxalate in the gut |
| Animal protein | Moderate meat, poultry and seafood | Reduces uric acid and urine acidity |
| Oxalate | If advised, limit very high-oxalate foods | Relevant for some calcium oxalate stone formers |
| Fruit and vegetables | Include plenty | Provide natural citrate, a stone inhibitor |
Which tests guide prevention?
- Stone analysis — identifies the stone type
- Blood tests — calcium, uric acid and kidney function
- 24-hour urine collection — recommended by the AUA for people with recurrent stones or a higher risk, to identify specific, correctable causes
Can medication prevent kidney stones?
When tests show a specific risk, medication may be recommended — for example thiazide diuretics for high urinary calcium, potassium citrate for low urinary citrate or uric acid stones, and allopurinol in selected cases. These are prescribed and monitored by your doctor.
Frequently asked questions
Should I avoid calcium if I have had a calcium stone?
No. A normal dietary calcium intake is recommended. Restricting calcium can actually increase the risk of calcium oxalate stones. Calcium supplements are different and should be discussed with your doctor.
References
- 1.Pearle MS, et al. Medical Management of Kidney Stones: AUA Guideline. J Urol. 2014;192(2):316–324. (opens in a new tab)
- 2.European Association of Urology. EAU Guidelines on Urolithiasis. (opens in a new tab)
- 3.National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Kidney Stones. (opens in a new tab)
This information is for general education and does not replace a consultation with a qualified doctor. If you have severe symptoms, seek emergency care (in Thailand, call 1669). See our medical disclaimer.