 [ Symptoms ] what causes kidney stones [ Disease ] here is a great webmd overview on kidney stones for you basically kidney stones are formed when minerals normally found in urine stick together forming hard pebbles sometimes people eliminate these stones when they urinate pee other times the stones are so large    or there are so many    that a medical treatment is required to get rid of them you can help yourself avoid getting kidney stones by drinking plenty of water your urine should usually be clear to light yellow in color if your urine is dark it could be an indication you are not drinking enough water hope this helps