Hello, the intake of water needs to be determined in combination with specific conditions. If it is not obvious edema caused by various causes such as nephrotic syndrome, acute renal failure, hydronephrosis, etc., there is no need to specifically restrict drinking water. The amount of water should be drunk every day. Add 500 ml on the basis of the total urine volume of the day before yesterday. This amount of water to be added to 500 is to eliminate the loss of moisture from the urine, respiratory, skin, gastrointestinal tract and the like. Do not drink more than 200 ml per drink， to drink a few mouthfuls. It is best to drink half a hour before going to bed. It is not advisable to drink water before and after meals. Drinking water before meals should be 15 minutes before meals. It is best to drink water for 30 minutes after meals. If you have edema, you don't need to be deliberately restricted. If you have edema, you need to limit the intake of water and salt. It is recommended that you further improve the examination, understand your current situation, and actively carry out systemic treatment.