SCIBladder and kidney stones are a common, often silent complication of a neurogenic bladder. Because you may feel no pain, they can grow unnoticed until they cause a serious problem. Here's what to watch for and how to stay ahead of them.
How Common They Are
They're far more frequent after SCI than in the general population. Within about eight years of injury, roughly 36% of people develop bladder stones and around 7% develop kidney stones. The risk is higher with indwelling catheters, recurrent infections, and higher/complete injuries.
Why They Form
- Urine sitting still — incomplete emptying and residual urine let minerals crystallize.
- Catheters — indwelling catheters especially are a major risk factor.
- Recurrent UTIs with urease-producing bacteria — these create struvite ("infection") stones.
- Immobilization — releases calcium from bone (see bone health) into the urine.
- High bladder pressures and poor drainage.
The Silent Warning Signs
Why They're Dangerous
A stone that blocks the flow of urine can back it up into the kidney (hydronephrosis), and over time that damages kidney function — a leading long-term threat after SCI. Stones also feed recurrent infections and can lead to urosepsis. This is why they're not left alone and why annual kidney imaging matters (see aging with SCI).
Prevention
- Empty well, with low residual. Intermittent catheterization generally carries lower stone risk than long-term indwelling catheters — discuss your bladder method with your urologist.
- Prevent and properly treat UTIs (and don't over-treat — see UTIs).
- Stay hydrated to keep urine dilute.
- Stay active / weight-bear where possible to reduce calcium loss.
- Keep annual urology follow-up with imaging so stones are caught small.
Treatment
Stones are removed, not monitored indefinitely, because of the kidney and infection risks. Options depend on size and location: shock-wave lithotripsy (breaks stones with sound waves — note this itself can trigger AD), ureteroscopy, and for bladder stones a cystolitholapaxy (breaking/removing them through a scope) or surgery for large ones. Removing the stone and fixing the underlying cause (drainage, infections) prevents recurrence.
What Nobody Tells You
- Recurrent UTIs often mean a stone. If infections keep coming back, ask for imaging — a stone harboring bacteria is a common hidden cause.
- AD can be your stone alarm. Unexplained dysreflexia warrants checking the urinary tract.
- Catheter blocking repeatedly? Suspect a stone. It's a classic sign with indwelling catheters.
- The yearly scan is how you protect your kidneys. Silent stones are caught on routine imaging long before they cause damage.
Sources & Further Reading
This page draws on lived SCI experience and published clinical guidance, including:
- Kidney Stones — National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Bladder Management Options Following SCI — Model Systems Knowledge Translation Center (MSKTC)
- Spinal Cord Injuries — MedlinePlus (U.S. National Library of Medicine)
SCI.help articles are information, not medical advice. Practice varies by injury level, provider, and institution — always confirm specifics with your own care team.