Patients with kidney stones are advised to eat more fruits, such as apples, watermelon, oranges, bananas, grapefruit and oranges. Among the reasons for the formation of kidney stones, diet is a very important reason, that is, eating too much of certain foods that tend to form certain kinds of stones. For example, in coastal areas all like to eat seafood, animal offal, or some people like to drink beer, such people are easy to form uric acid stones; people who usually like to eat meat or eggs and drink milk are easy to form cystine stones; some people like to eat snacks, such as strawberries, chestnuts, pine nuts, etc., these people are easy to form oxalic acid stones. However, the fruits just mentioned, such as apples and watermelons, do not belong to these three types of food. Even if they are consumed for a long time, they do not have any bad effects on the body, not only are they not easy to form stones, but they also contain more water, which has a diuretic effect and can promote the discharge of stones. For these three types of food that can form stones, it is recommended that kidney stone patients usually eat less.