Kidney stone patients can drink lemon tea and also lemon water. Lemon juice is rich in citric acid, which has a clear role in inhibiting stone formation, and it can also replenish a certain amount of water, so it can prevent the occurrence of stones after drinking it in large quantities for a long time. It not only increases the ingredients that inhibit stone formation, but also produces more urine to dilute the urine and avoid excessive concentration of urine to prevent stone formation. However, there are various reasons for stone formation. For stones formed by metabolic diseases, consumption of lemon tea or citric acid will not significantly inhibit stones, such as cystine stones or uric acid stones, which are related to metabolic abnormalities in the body and not to excessive concentration of urine. When secondary hyperparathyroidism is present, multiple stones can be formed and surgical treatment is required to remove the parathyroid glands to prevent stone formation, while drinking more water or taking anti-stone medication will not suppress the metabolic abnormalities in the body in the long run and therefore will not suppress stone formation.