Diarrhea, also known as diarrhea, refers to the increased frequency of stools, stools become dilute, unshaped or watery stools, diarrhea is easy to cause water electrolyte disorders, should be treated in a timely manner, including etiological treatment and symptomatic treatment. 1. Causative treatment: It is recommended to test the stool routine, if there are a large number of leukocytes in the stool or elevated leukocytes in the blood routine, with high neutrophils, it is considered to be related to the infection in the intestinal tract, and anti-inflammatory drugs can be taken orally, such as safranin, haloperidol, and so on. Combined with the patient’s clinical manifestations, endoscopy to determine whether the inflammatory bowel disease, need to use mesalazine and other treatment. If the diarrhea is caused by gastrinoma, hyperthyroidism and other extra-intestinal factors, it is necessary to treat the primary disease, and not simply apply the drugs for the treatment of intestinal diseases. 2. Symptomatic treatment: including the correction of water, electrolyte, acid-base balance disorders and nutritional imbalance, supplementation of vitamins, amino acids, fat milk and other nutrients. Antidiarrheal drugs, such as montelukast, can be applied as appropriate after determining the cause of the disease. It is recommended that patients with chronic diarrhea consult a medical professional for treatment, and not blindly take antidiarrheal drugs, so as not to cover up the real condition, leading to misdiagnosis or even delayed condition.