Men who wipe their buttocks with blood after defecation are mostly seen in conditions such as hemorrhoids, inflammatory bowel disease, anal fissure, colorectal cancer, rectal polyps and so on. 1. Hemorrhoids: one of the common causes of blood in men’s stools, mainly manifested as fresh blood in stool, blood covering the surface of the stool, without pain during defecation, some patients can touch the anal prolapse of hemorrhoids, mostly internal hemorrhoids. 2. Inflammatory bowel disease: mainly seen in ulcerative colitis, the patient manifested as recurrent diarrhea and mucus pus blood stool, stool blood slightly dark red. 3. Anal fissure: it is mostly seen in patients with long-term constipation, and there will be obvious tearing pain in the anus accompanied by fresh blood when they defecate with force. 4. Colorectal cancer: mainly seen in elderly men, patients will have diarrhea and constipation in addition to blood in stool, and other changes in bowel habits. 5. Rectal polyps: the mucous membrane on the surface of polyps is easily scratched by cirrhosis stool, and there is blood on the surface of stool, and there is blood on the paper when wiping the buttocks. Men with blood in the stool, should be timely outpatient consultation, clear cause, active treatment.