3.Some inflammatory diseases of the upper gastrointestinal tract, such as ruptured esophagogastric fundic varices or gastric cancer, will also be accompanied by abdominal pain and blood in stool. 4.Dysentery caused by intestinal infection with virus or bacteria will also cause abdominal pain and blood in stool. 5.If you have colon polyps or colon cancer, you will also have abdominal pain and blood in stool. No matter what kind of situation causes blood in the stool and abdominal pain, it is recommended to go to the hospital for relevant examination in time.