The diarrhea caused by stomach pain is considered to be caused by enteritis, intestinal polyps, and intestinal malignancies. If the intestinal tract is infected with bacteria, repeated inflammatory stimulation will cause damage to the mucosa in the intestinal tract, resulting in an increase in the number of stools, bloody diarrhea, and abdominal pain. Stomachache and bloody diarrhea may also be caused by intestinal polyps. Intestinal polyps can cause constipation and diarrhea alternately, as well as bloody stool and abdominal pain. Intestinal malignancies, such as rectal cancer and colon cancer, cause pain, surface ulceration and bloody stool due to tumor stimulation of intestinal mucosa.
