If you have vague pain in the abdomen after defecation, you can consider whether it is enteritis. Infection of the intestines by certain bacteria or viruses triggers inflammation, which can cause blood in the stool and abdominal pain. After excluding enteritis, some intestinal diseases, such as intestinal polyps, intestinal tumors, colon cancer, ulcerative colitis, intestinal overlap, etc., can also trigger abdominal pain and blood in stool. Ulcerative colitis usually has a long history of mucus in the stool with bleeding. For this condition, a formal examination is required to confirm the diagnosis. It is recommended to go to the hospital for a systematic examination for timely detection and treatment to avoid delaying the condition. For digestive system diseases, in addition to active medical treatment, it is also important to pay attention to life dietary regimen.