Suddenly for several days in a row diarrhea and black stools to consider the existence of diarrhea and gastrointestinal bleeding phenomenon, may be peptic ulcer, ulcerative colitis and other diseases caused by dietary adjustments such as avoiding chili peppers, taking omeprazole, luzosulfadiazine and other medications for relief and treatment. 1. Dietary adjustments: stop eating and avoid eating spicy and stimulating, cold and hard foods, such as hot and spicy, stinky tofu, fried chicken, beer, cold drinks, soft drinks and so on. Daily diet should be light and easy to digest, such as noodles, millet porridge and so on. 2. Medication: (1) peptic ulcer: that is, gastric and duodenal ulcers, ulcer bleeding can cause vomiting blood, black stools and other peptic bleeding manifestations, you can take omeprazole and other acid inhibitors, bismuth potassium citrate and other gastric mucosal protectants, and growth inhibitors and other growth inhibitors can be selected for hemostasis or endoscopic hemostasis if necessary. (2) Ulcerative colitis: it can cause diarrhea, abdominal pain, abdominal distension, nausea, bleeding, emaciation, etc. It can be treated with aminosalicylic acid preparations such as Liuzosulfapyridine and immunosuppressants such as cyclophosphamide. Suddenly for several consecutive days of diarrhea and black stools may also be cirrhosis and other diseases caused by the three-lumen two-capsule tube compression to stop bleeding and other ways of treatment, it is recommended to consult a doctor in order to clarify the diagnosis, targeted treatment. In addition, all of the above drugs should be taken under the guidance of a doctor and should not be used without authorization.