There may be more than one stone, and they may be large or small.
Men get kidney stones more often than women do.
Causes An illness called gout can cause kidney stones, as can a blockage of urine or a large amount of calcium in the urine. Too much calcium from food, vitamins, or other sources can contribute to formation of the stones. Your doctor may also prescribe pain medicine. If the stone doesn't pass naturally, you may need to be hospitalized Risks Kidney stones can cause long-term kidney problems that in rare cases can be fatal. But with proper treatment, serious problems are unlikely.