1, adjust the diet Breastfeeding children continue to breastfeed, less than 6 months of artificial feeding children can continue to feed formula, more than 6 months of children can continue to eat has been accustomed to the daily food, such as porridge, noodles, thin rice, eggs, minced fish, minced meat, fresh fruit juice. Encourage your child to eat, and increase the number of feeding meals if the amount of food is low. Avoid feeding the affected child vegetables and fruits containing coarse fiber and foods high in sugar. Viral enteritis often has a secondary disaccharidase (mainly lactase) deficiency, for suspected cases can be temporarily given to change to low (de-)lactose formula for 1 to 2 weeks, after the diarrhea improves to the original feeding method. 2, nutritional therapy ① glycogenic diarrhea: lactose intolerance is the most common. Treatment is advisable to adopt a de-dieting diet, which can use de-(or low) lactose formula or soy-based protein formula. ②Allergic diarrhea: milk allergy is more common. Avoid allergic foods or use oral desensitization feeding methods that do not restrict already tolerated foods. Infants can usually tolerate deeply hydrolyzed casein formula; if still intolerant, amino acid-based formula or a whole-elements diet may be used. ③Elemental diet: for those with chronic diarrhea, intestinal mucosal injury, and malabsorption syndrome. ④Intravenous nutrition: for a few severe cases, who cannot tolerate oral nutrients, with severe malnutrition and hypoproteinemia.