Butt pulling blood may be a lot of diseases, common hemorrhoids, inflammatory bowel disease, intestinal malignant tumors and other reasons related. 1. Hemorrhoids: external hemorrhoids after straining to defecate, accompanied by bleeding; internal hemorrhoids in the normal defecation, did not feel any discomfort in the anus, but in the toilet paper or toilet bowl found bright red blood. 2. Inflammatory bowel disease: for example, the typical symptom of ulcerative colitis is mucous pus and blood stool. 3. Intestinal malignant tumors: for example, when malignant tumors such as rectal cancer invade blood vessels, it can lead to blood vessel rupture and bleeding, resulting in blood in stool. In addition, anal trauma, ulcerative colitis, amoebic dysentery, upper gastrointestinal ulcer, esophagogastric fundus varices and other diseases, may also appear “blood in the buttocks” symptoms. It is recommended to go to the hospital in a timely manner, complete the examination, after a clear diagnosis, under the guidance of the doctor for standardized treatment, so as not to delay the condition of the body to bring adverse effects.