Silent kidney stones: when to watch and when to treat
Updated: 4 hours ago
The short answer
Most kidney stones you cannot feel are safe to watch, but silent does not mean harmless. Over five years, the odds that a silent stone causes pain, blockage, or surgery climb to about 31 percent, and the highest risk sits with stones over 5 mm, stones in the lower pole of the kidney, and stones that grow more than 1 mm a year. A June 2026 meta-analysis found that treating a silent stone early can lower the odds of a future stone event and future surgery, but it pooled only six small trials, so it points to selected higher-risk patients, not routine treatment for everyone. The most useful step is to get the stone's size and location off your scan report and put a follow-up scan on the calendar.
What we cover
How often silent stones show up: about 1 in 20 healthy adults screened to donate a kidney (BJU International, 2012)
What five years of watchful waiting actually showed, with risk climbing from about 3 percent at one year to about 31 percent at five years (BJU International, 2018)
The features that separate a quiet stone from one that needs surgery: size over 5 mm, a lower-pole location, and growth over 1 mm a year (BJU International, 2018)
The two numbers to read off your own scan report: the stone's size in millimeters and which pole it sits in
Why the coconut water, olive oil, and lemon flushes online cannot dissolve a stone you can already see on a scan
What a June 2026 meta-analysis found about treating a silent stone before it causes symptoms (World Journal of Urology, 2026)
How to tell whether you fall in the watch group or the higher-risk group that should ask a urologist
Timestamps
00:00 Two scans, two different fates
00:50 Meet Dr. Sean Hashmi
01:10 How common silent stones really are
01:51 The 5-year risk of doing nothing
03:07 What predicts which stones cause trouble
04:12 Why location and size matter
05:26 What watching actually means
05:56 What helps, and what's just marketing
07:36 The real danger: growth, not size
08:08 The 2026 study on treating early
09:34 How to use this on your own scan
10:20 Two listener stones, two different plans
13:16 The one idea to remember
References
Olsburgh J, et al. Incidental renal stones in potential live kidney donors: prevalence, assessment and donation. BJU International. 2012;111(5):784-92. PMID 23110544. DOI 10.1111/j.1464-410X.2012.11572.x. https://doi.org/10.1111/j.1464-410X.2012.11572.x
Prevalence of silent stones in healthy kidney donors, about 5 percent on CT (observational). BJU International, 2012. Olsburgh J, et al.
Darrad M, et al. The natural history of asymptomatic calyceal stones. BJU International. 2018;122(2):263-269. PMID 29675983. DOI 10.1111/bju.14354. https://doi.org/10.1111/bju.14354
Natural history of asymptomatic calyceal stones, with adverse-event risk rising to about 31 percent at five years and younger age and growth over 1 mm a year as the strongest warning signs (observational). BJU International, 2018. Darrad M, et al.
Li X, et al. Outcomes of long-term follow-up of asymptomatic renal stones and prediction of stone-related events. BJU International. 2018;123(3):485-492. PMID 30253029. DOI 10.1111/bju.14565. https://doi.org/10.1111/bju.14565
Long-term follow-up of asymptomatic renal stones and predictors of stone-related events, where stones over 5 mm and lower-pole stones were less likely to pass (observational). BJU International, 2018. Li X, et al.
Tuo X, et al. Intervention versus observation for asymptomatic kidney stones: a systematic review and meta-analysis of randomized controlled trials. World Journal of Urology. 2026;44(1). PMID 42289039. DOI 10.1007/s00345-026-06536-5. https://doi.org/10.1007/s00345-026-06536-5
Intervention versus observation for asymptomatic kidney stones, a systematic review and meta-analysis of six randomized trials and about 592 patients, where early treatment lowered the odds of a later stone event and later surgery without more complications. World Journal of Urology, 2026. Tuo X, et al.
One study explained in plain language every week, with sources attached, plus the free kidney health guide: https://guides.selfprinciple.org/kidney
This content is for educational purposes only and is not medical advice. Always consult your healthcare provider for individual care. The views expressed are Dr. Sean Hashmi's own and do not represent his employer.
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