Pediatric diarrhea is a general term for a group of diseases caused by a variety of pathogens and symptoms, with an increase in the number of stools, a change in the nature of the stool may also be accompanied by fever and vomiting and varying degrees of dehydration. 1, intestinal infectious diarrhea: generally caused by viruses, bacteria, fungi, parasites, and the most common bacteria and viruses, autumn and winter with intestinal rotavirus infection is the most common disease, fever and vomiting followed by diarrhea, the number of diarrhea can reach a dozen times a day. 2, non-infectious diarrhea: such as indigestion, the treatment of other diseases caused by the imbalance of the flora, may cause the occurrence of pediatric diarrhea. There are also allergic diarrhea, such as allergy to milk or soy products and diarrhea, including primary and secondary lactose intolerance, as well as sudden changes in climate, abdominal cold or too hot weather, reduced secretion of digestive juices, or diarrhea due to thirst induced by excessive milk consumption and other digestive disorders. Treatment principles: 1. Rational diet, maintenance of nutrition, rapid correction of electrolyte disorders to control the infection in the field, and then give appropriate drugs to regulate the imbalance of the flora and anti-diarrheal drugs. 2, in order to prevent dehydration, when the child appears diarrhea to give the corresponding rehydration salt solution, 20 ~ 30 ml per kilogram of body weight, drink within 4 hours, if there are serious symptoms of dehydration need to give infusion treatment. 3, if the prolonged diarrhea for more than half a month, lactose intolerance is considered, anti-diarrheal milk powder can be given to deal with.