Bleeding from wiping the buttocks is generally considered to be caused by defecation, which may be related to hemorrhoids, anal fissure, intestinal polyps, intestinal tumors and other causes. 1. Hemorrhoids: such as internal hemorrhoids, the most typical symptoms of blood in the stool and prolapse of internal hemorrhoids, painless intermittent bleeding after defecation, which can be stopped by themselves; when the external hemorrhoids are infected or rubbed, there will be bleeding, usually bright red, most people can appear mixed hemorrhoids that is, internal and external hemorrhoids are present. 2. Anal fissure: manifested as three major symptoms, namely constipation, pain, blood in the stool, constipation can be seen when discharging dry and hard feces dripping blood or blood on the paper. 3. Intestinal polyps: such as rectal polyps, due to the low position of the polyp, larger or squeeze the polyp during defecation, there is more bleeding, and there can be blood on the handkerchief. 4. Intestinal tumor: such as rectal cancer patients, when the tumor invades a large area or appears in a low position, there may be blood on the paper when wiping. When there is blood in stool or blood on wiping paper, it may belong to bleeding caused by perianal abscess or perianal chalk tumor. It is recommended to consult a doctor in time to clarify the cause of bleeding, targeted treatment, so as not to delay the condition.