Dry colon, bleeding bowel movements may be caused by intestinal flora disorders, hemorrhoids, anal fissure and other reasons. 1. Intestinal flora disorders: intestinal flora disorders can lead to intestinal peristalsis is too slow, the stool in the body stays too long, the water is absorbed, and when discharged, the extrusion of the intestinal tract leads to the rupture of the rectal mucosa, which results in the emergence of a dry colon, bleeding bowel movements. 2. Hemorrhoids: the typical symptom of hemorrhoidal nuclei in the anus, which can cause mucous membrane bleeding during bowel movement, and mixed with stool to cause dryness of the colon and bleeding in bowel movement. 3. Anal fissure: the stool is too dry, when defecating, the stool squeezing the anus can cause sphincter cracking triggered by anal fissure, anal tearing serious will be accompanied by blood flow, resulting in the above symptoms. If you have dry bowels and bleeding bowel movements, you should consult a doctor in time to get a clear diagnosis and treatment under the guidance of a professional doctor, and pay attention to a light diet and drink more water.