The main cause of diarrhea is gastrointestinal dysfunction, intestinal infection, intestinal flora disorders, gastrointestinal digestive malabsorption, acute and chronic gastroenteritis, ulcerative colitis, Crohn’s disease, bacterial dysentery, food poisoning and other diseases, which require specific treatment after clarifying the cause. 1, gastrointestinal dysfunction: intestinal peristalsis too fast to stimulate the intestinal mucosa and induce diarrhea. Such patients need to pay attention to diet, avoid raw, cold, hard, spicy, stimulating, greasy food, regular life and rest, eat more fresh vegetables, fruits, pay attention to abdominal warmth. The symptoms of diarrhea can be relieved by moxibustion, abdominal massage and moderate exercise. It can also be treated with aloe vera capsules and probiotics under the guidance of doctors; 2, intestinal infections: such as intestinal tuberculosis, intestinal candidiasis, intestinal amebic dysentery, bacterial infections, etc. Anti-infection treatment is needed according to the cause of the infection; 3, intestinal flora disorders: care should be taken not to use antibiotics indiscriminately in general, and intestinal probiotics can be used under the guidance of doctors to adjust the balance of intestinal flora; 4, gastrointestinal Digestive malabsorption: including poor gastric peristalsis gastric light paralysis and esophageal reflux disease, can be manifested as abdominal pain, diarrhea, it is recommended to take probiotics treatment; 5, acute and chronic gastroenteritis: due to cold and flu, improper diet, overeating or eating cold, unclean food and so on. Can take levofloxacin or montelukast under the guidance of the doctor, if the symptoms can not be relieved, it is recommended to go to the hospital gastroenterology department to check the stool routine and gastrointestinal microscopy. Daily life should eat less spicy, stimulating, dry, hard, rough and cold food, try to light diet, such as steamed buns, millet porridge, noodles, etc.; 6. Ulcerative colitis: manifested as bloody diarrhea, abdominal pain, blood in stool, weight loss, urgency, vomiting, etc. Attention should be paid to bed rest and systemic supportive treatment, pay attention to protein supplementation, improve systemic nutritional status, and give total gastrointestinal nutritional support if necessary, and blood transfusion can be given to those with anemia. Salicylic acid preparations such as salazosulfapyridine and mesalazine are commonly used clinically for treatment. Patients with severe ulcerative colitis can be treated surgically; 7. Crohn’s disease: manifested as abdominal pain, diarrhea, intestinal obstruction, which can be accompanied by fever, nutritional disorders and other extraintestinal manifestations. Bed rest, high nutrition and low residue diet are recommended during the active period. For severe symptoms, temporary fasting is recommended, correction of water, electrolyte and acid-base balance disorders, and enteral or parenteral nutritional support. In case of anemia, vitamin B12, folic acid or blood transfusion can be supplemented. Also can be used to treat with salazosulfapyridine, adrenal corticosteroids or 6-mercaptopurine and other drugs; 8, bacterial dysentery: can be manifested as fever, abdominal pain, diarrhea, acute, mucopurulent stools, accompanied by systemic toxemia symptoms, severe cases can cause infectious shock and toxic encephalopathy. Bed rest, GI isolation, antibacterial therapy and symptomatic treatment are given in the acute phase. Treatment of toxic dysentery should be anti-infective, control high fever, and prevent complications such as convulsions, circulatory failure, cerebral edema or respiratory failure. The treatment of chronic bacillary dysentery needs to find the causative factors and symptomatic treatment; 9. Food poisoning: it can be manifested as nausea, vomiting, abdominal pain, diarrhea and other symptoms of acute gastroenteritis. Salmonella food poisoning should also pay attention to bedside isolation, actively search for the cause of poisoning and treat the cause.