There are two common ways to stop diarrhea, which are treating the cause and treating the symptoms. 1. Anti-causal treatment: There are many causes of diarrhea. Infectious diarrhea needs to be treated against the pathogen; antibiotic-related diarrhea should stop the antibiotic or adjust the antibiotic used; allergy- or drug-related diarrhea should avoid contact with allergens and stop the use of relevant medications; hypertonic diarrhea should stop taking hypertonic medications or diets. Specific treatment should be combined with the cause of the disease. 2. Symptomatic treatment: There are many medicines for treating diarrhea. Bismuth subsalicylate is safe and effective for bacterial diarrhea; plus montelukast and probiotics can relieve symptoms. Loperamide and non-steroidal anti-inflammatory drugs can be given for mild and moderate diarrhea caused by chemotherapy and radiotherapy, and octreotide can be used for severe diarrhea. If diarrhea symptoms occur, it is recommended to consult a doctor in time, identify the cause of the disease and follow the doctor’s instructions.