The diarrhea is mainly caused by acute diarrhea, acute gastroenteritis, dysentery, cholera, and need to consult the gastroenterology department to clarify the specific causes and carry out targeted treatment. 1, acute diarrhea: caused by acute intestinal infection, bacterial food poisoning, acute poisoning, etc., can be manifested as jet diarrhea, fever, abdominal pain and leukocytosis, etc.. Attention should be paid to rest in bed as much as possible, drink more water, take oral glucose, etc. to replenish fluid loss. If vomiting persists or dehydration is evident, intravenous administration of glucose sodium chloride and other relevant electrolytes is required. If necessary, antispasmodic and antiemetic medications such as belladonna and chlorpromazine injections and antidiarrheal medications such as montelukast can be used. For infectious diarrhea, targeted antibacterial agents such as safranin can be used appropriately. 2. Acute gastroenteritis: Gastrointestinal dysfunction due to cold and flu, improper diet, overeating or ingestion of raw, cold, unclean food, and then diarrhea with jet-like watery stools. Levofloxacin can be taken under the guidance of the doctor. If the symptoms cannot be relieved, it is recommended to go to the gastroenterology department of the hospital for routine stool examination and gastroenteroscopy. In daily life, avoid spicy and stimulating, dry, hard, rough and cold food, and try to eat a light diet, such as steamed buns, millet porridge, noodles, etc.; 3, dysentery: usually caused by eating cold, greasy, irritating food, manifested as watery, dysentery-like diarrhea. The acute phase is given bed rest, digestive tract isolation, antibacterial treatment and symptomatic treatment. Toxic bacillary dysentery should be anti-infective, control high fever and convulsions, prevent cerebral edema and respiratory failure. The treatment of chronic bacillary dysentery needs to find the cause and symptomatic treatment; 4, cholera: the cause of cholera is Vibrio cholerae infection, which can be manifested as watery, jet-like diarrhea. Patients with cholera should be treated in hospital as soon as possible, receive strict isolation, timely rehydration treatment, supplemented by antibacterial therapy and symptomatic treatment. In severe cases, intensive care is needed to closely monitor changes in vital signs and record changes in volume of intake and output.