A bladder stone is a hard deposit of minerals and organic matter that forms in the urinary bladder, often when urine does not empty fully or when infection or other problems change urine composition. Below are plain-language explanations of what bladder stones are, common symptoms, possible causes, how they are assessed, and practical prevention tips.
What is a bladder stone?
Bladder stones range from tiny grit to large single stones. They can form inside the bladder or travel down from the kidneys. Size and number vary; some cause few symptoms while others irritate the bladder lining or block urine flow.
Symptoms and when to seek urgent care
Common signs include frequent or urgent need to urinate, burning or pain while urinating, cloudy or discolored urine, and lower abdominal discomfort. Seek urgent medical evaluation for sudden severe pain, inability to pass urine, high fever, or heavy bleeding from the urinary tract.
Causes and risk factors
Stones develop when urine stagnates or becomes concentrated, allowing minerals to crystallize. Factors that raise risk include incomplete bladder emptying (for example from prostate enlargement or nerve-related bladder dysfunction), recurrent urinary infections, long-term catheter use, older age and certain anatomical issues.
Diagnosis and which specialist to consult
A clinician will usually take a medical history and perform a physical exam; common tests include urinalysis and imaging such as ultrasound or X-ray as needed. Urology specialists commonly manage bladder stone evaluation and follow-up; your primary care clinician can advise when referral is appropriate.
Prevention and practical steps
Steps that help lower the chance of bladder stones include staying well hydrated, addressing recurrent urinary infections promptly, and following up on urinary symptoms that suggest incomplete emptying. If you have ongoing urinary problems or repeated infections, discuss evaluation with your clinician to reduce future risk.