1. Patients with acute gastroenteritis should stay in bed and keep warm. 2. Patients in acute stage often have vomiting, diarrhea and other symptoms, and lose a lot of water. Therefore, it is necessary to replenish liquids, and provide liquid foods such as fresh fruit juice, lotus root starch, rice soup and egg soup, and drink more boiled water and light salt water as appropriate. 3. In order to avoid gastrointestinal fermentation and flatulence, we should avoid eating gas-producing foods such as beef in the acute stage and try to reduce the intake of sucrose. Attention should be paid to food hygiene. Do not eat high-fat fried, fried, smoked and waxed fish, vegetables and fruits with more cellulose, irritating drinks, foods and condiments. Early stage of gastroenteritis: it is the serious stage of acute congestion, edema, inflammation and exudation of the intestine. At this time, the intestinal peristalsis is active or in a spastic state, and its digestive and absorption functions are relatively weak. Therefore, within 8 ~12 hours after onset, patients can eat liquid foods, such as rice porridge, egg batter and fine dried noodles. If diarrhea is severe or sweating is more, patients should be given more soup to supplement the deficiency of water, vitamins and electrolytes in the body. Gastroenteritis improvement period: patients can be given some liquid or semi-liquid foods that are easy to digest and rich in nutrition, such as thin wonton skin and steamed egg soup. It is advisable to eat less and eat more meals, 4 ~ 5 times a day. It should be noted that it is not advisable to drink milk and eat a lot of sucrose at this time. Recovery period of gastroenteritis: We should pay special attention to diet control, and eat some vegetarian, soft and warm foods, and avoid eating fat, fried foods, cold and hard foods and fiber-rich foods too early, such as celery, soybean sprouts, leeks and garlic moss. After 2 ~ 3 days of recovery, you can eat according to your normal diet.