How do i prevent kidney stones. this is my second one. thought i passed it at the hospital and was discharged but now having more pain.

Diet, drink a lot,,,: Likely your best chance to prevent kidney stones is a more careful diet with better quality meats, and more drinking of fluids, especially water. Fluids dilute whatever is in the urine and better meat would mean good protein that is less concentrated, like steak instead of organ meats like kidney. Fruits and vegetables should also help move bowels so there is less excreted in urine.

Seek evaluation.: If you have recurrent stones, see a urologist for evaluation. In general: 1) increase fluid intake up to 2l of water/day. 2) follow a low salt diet, which lowers calcium in the urine. 3) reduce dietary protein, to lower calcium & oxalate in the urine. 4) do not restrict dietary calcium, but stick to the usrda. If you continue to recur, a metabolic workup by a urologist might be needed.