Normal people drink water even if they drink a lot of water, it will be excreted from the kidneys, so edema does not usually occur. If edema occurs, consider whether the patient has hyperalgesia or cardiac hypofunction. If there is renal and cardiac hypofunction, which leads to edema after drinking water, you need to go to the hospital as soon as possible and give appropriate treatment such as taking diuretics to promote water excretion from urine, reduce the burden on the heart, improve cardiac function and other treatments, and the edema can be eliminated through comprehensive treatment. However, patients with cardiac or renal insufficiency are recommended to drink moderate amounts of water, and it is not recommended to drink a large amount of water in a short period of time, because such patients have limited water excretion in their bodies.