Bladder stones are hard masses of minerals in your bladder. They develop when the minerals in concentrated urine crystallize and form stones. This often happens when you have trouble completely emptying your bladder.
Small bladder stones may pass without treatment, but sometimes bladder stones need medications or surgery. Left untreated, bladder stones may lead to infections and other complications.
Sometimes bladder stones — even large ones — cause no problems. But if a stone irritates the bladder wall or blocks the flow of urine, signs and symptoms may include: