Patient’s question: Disease: How can I do some preventive measures positively after urinary stones surgery? Doctor’s reply: The child’s stone composition analysis report and stone prevention recommendations are sent to you, please take preventive measures in a targeted manner. Test report (stone composition): calcium oxalate monohydrate, calcium oxalate dihydrate. Preventive advice: 1. Drink plenty of water: drink at least 2000ml of water daily (equivalent to a thermos bottle) to ensure that the daily urine volume is more than 2000ml; 2. Limit sodium and salt: sodium can cause an increase in urinary calcium excretion, so the daily consumption of sodium chloride (table salt) should not exceed 5 grams, avoid MSG and chicken essence; 3. Cocoa, chocolate, tea, various nuts (chestnuts, almonds, walnuts, etc.), should be avoided or eaten less; 4, often eat citrus: eating citrus fruits can increase the content of citric acid (stone inhibition factor) in the urine, help prevent the recurrence of stones; 5, moderate exercise: conducive to the discharge of tiny stones, but should prevent excessive exercise resulting in dehydration caused by urine concentration; 6, weight control: obesity easily lead to stone formation Obese people should reduce their body weight; 7.Regular physical examination: the urological ultrasound should be routinely reviewed every year.