Patients with kidney stones can eat grapefruit, which contains citric acid, which can increase the pH of urine after a long and large intake to prevent the formation of stones. Citric acid can effectively prevent the formation of stones, but the formation of kidney stones is not a single factor, it is a multi-factor, slow process, so in daily life, except for dietary control, but also need to maintain a certain amount of water to prevent excessive concentration of urine, urine in a concentrated state for a long time, over time, it is easy to form a stone. It is also necessary to go to the hospital for further stone analysis, or check the composition of stones, to clarify the specific composition of stones, so as to do some prevention. For example, for xanthine stones, it is necessary to reduce seafood products, animal offal and alcohol consumption to prevent stone formation. For oxalate stones, it is necessary to reduce the intake of spinach, lettuce, chocolate, cocoa, prunes, strawberries, etc. in daily life to prevent further increase in stone size. For infected stones, chronic urinary tract infections need to be treated so as to prevent the formation of infected stones.