Routinely, the recommended daily water intake for healthy adults is 1500-1700ml. Normal people need 40 ml of water per kilogram of body weight per day, which means that a 60 kg adult needs about 2400 ml of water. Food will contain about 700 ml of water, the oxidation of sugar, fat and protein in the body will produce about 300 ml of water, and stools will take away some of the water. Therefore, it is recommended that a normal adult consume an additional 1,500 to 1,700 milliliters of water in addition to the water in food. It should be noted that the body’s water needs are not constant. The amount of water consumed can be increased appropriately in hot airy hot environments, or relatively dry environments. If severe nausea, vomiting, diarrhea and other symptoms, according to the severity of the symptoms and the specific circumstances to increase the amount of water. If more serious liver, kidney, heart failure, according to the severity of the disease, to strictly limit the amount of water intake, at this time need to be under the guidance of the doctor intake of water.