Drinking water at each time period is different, otherwise it will be harmful to the body. After a night’s sleep, the lack of water in the body should be timely replenishment of water, about 200ml in the morning after waking up to replenish the water lost overnight. Usually you can add a small amount of water, at least 2000ml per day in hot weather in summer and 1200ml in winter. If you drink too much water will lead to electrolyte disorders in the body, cell edema, panic, weakness of limbs, dizziness and other manifestations of water intoxication. The body’s water will be turned into urine through the kidneys and excreted out of the body, excessive drinking will add burden to the kidneys, which can seriously lead to kidney damage. The human digestive system is mainly through the gastrointestinal tract, food intake into the stomach through the gastric juice for digestion, such as drinking too much water will lead to dilution of the digestive juices in the stomach, directly affecting the digestion and absorption of food, so it will cause abdominal distension, indigestion and other symptoms.