Under normal circumstances, adults need 2000-3000 ml of water every day. The more physical activity and sweating, the greater the demand for water. Drinking water is not timely, and lack of water in the body will bring many problems. Drink water slowly in small amounts for many times, so as not to increase the burden on the heart and kidney, and avoid excessive thirst and drinking a lot of water. Sweating in summer, dehydration and salt loss. If you suddenly drink a lot of water, there is less salt and more water in your blood, it is easy to have "water poisoning" and cause collapse. After severe diarrhea, the body is dehydrated. At this time, it is best to add a proper amount of salt, sugar and a small amount of soda in drinking water to maintain electrolyte and acid-base balance. People with cardiac and renal insufficiency should not drink more water to avoid increasing the burden on organs. In addition, it is not recommended to eat soaked rice. Generally, the rice soaked in water is not chewed enough, and the saliva secretion is not much, which will increase the burden of gastrointestinal digestion.