Diarrhoeal patients cause fever, indicating that there is intestinal infection. It is suggested that anti infection, anti diarrhea, probiotics, etc. should be given to symptomatic treatment. Generally, it is caused by unclean diet. It is recommended to pay attention to the hygiene of diet at ordinary times. In terms of diet, attention should be paid to avoiding spicy, stimulating, raw, cold, coarse and greasy food. Unclean diet is often the inducement. If necessary, colonoscopy should be improved to understand intestinal diseases. It is necessary to exclude organic diseases, as well as systemic diseases that can cause diarrhea. For example, diabetes, hyperthyroidism, etc. can also cause diarrhea, which needs to be checked to exclude. If the symptoms cannot be controlled, it is recommended to be hospitalized for treatment, because severe intestinal infection can secondary to other important organ lesions, and serious intestinal infection can affect life.