Abdominal pain is not necessarily a sign of bowel cancer, but may also be caused by ulcerative colitis and Crohn’s disease. 1. Bowel cancer: Bowel cancer includes rectal cancer and colon cancer, etc. Most of the early bowel cancers do not have obvious discomfort symptoms, only a small number of people in the early stage of bowel cancer will have hidden pain in the abdomen, and with the growth of the tumor, it may lead to pus and blood in the stools and other symptoms. 2. Ulcerative colitis: abdominal pain may also be caused by ulcerative colitis, the cause of this disease is still unclear, it may be related to irregular diet, consumption of stimulating food, etc. When patients suffer from this disease, they will have abdominal pain, pus in stool, long-term diarrhea and other symptoms. 3. Crohn’s disease: Crohn’s disease is a kind of intestinal inflammation, usually after suffering from this disease, patients will have fever, weight loss, diarrhea, abdominal pain and other symptoms. Abdominal pain is not necessarily a sign of intestinal cancer, patients do not need to worry too much, they should go to the hospital for examination and treatment in time, and must not be negligent so as not to delay the condition.