Stomach pain and bleeding in the stool may be strangulated intestinal obstruction, ulcerative colitis and gastrointestinal bleeding, which can be treated by medication and surgery. 1. Ulcerative colitis: repeated episodes of diarrhea, diarrhea, mucus, pus and blood stools, as well as fever, lethargy and other symptoms, abdominal pain is usually manifested as mild to moderate pain, usually can be relieved after the stool. 2. Strangulated intestinal obstruction: it can be manifested as acute onset of abdominal pain and persistent pain, vomiting, anal discharge of blood or jam-like stool. Once the diagnosis of intestinal obstruction is confirmed, surgery should be performed immediately. 3. Gastrointestinal bleeding: mostly due to ulcers, tumors and other causes of bleeding. It can be manifested as the reduction of abdominal pain after bleeding, black stools, large amount of bleeding may appear vomiting blood, often coffee-colored. The treatment is mainly based on conservative treatment with drugs, and surgery is needed if the condition does not improve. There are many other causes that can lead to abdominal pain with blood in the stool, after the appearance of such symptoms, it is recommended to go to the hospital immediately for further examination, after a clear diagnosis to be treated accordingly.