Drinking water at night and having edema the next day indicates that you are drinking too much water, which is not effectively eliminated from the body. This situation should be recommended to control the amount of water to drink, and at the same time do not eat too salty food, resulting in too much water and sodium retention, leading to edema the next day. Oral diuretics can soon relieve edema, and at the same time, we should pay attention to whether there is bad cardiac function, bad lung function or hypoproteinemia or bad renal function. You should go to the hospital for liver function and kidney function tests, and pay attention to whether there is panic, chest tightness and shortness of breath. Only by finding out the cause of the disease and treating the primary cause can edema be relieved. It is recommended that you should control the amount of water you drink and eat too salty food.