Kidney stones can occur due to many reasons.To prevent stones recurrence ,you need to drink at least 2-3 liters of fluids in 24 hours.(simply you can drink one glass of water every hourly while you are awake.You need to have stone analysis for dietary guidance.Drink at least one or two glass of milk,lemon juice once a day,avoid extra calcium intake unless recommended by your doctor, and cut down on salt intake .Keep your body fit and avoid obesity.Your urologist will further guide you for prevention