Bleeding from the buttocks is a form of blood in the stool. Basically, there are several causes: the most common are internal hemorrhoids, anal fissures, perianal fissures, perianal ulcers and anal fistulas. First, internal hemorrhoids bleeding are mixed with stool out, not only on the hand paper, you can see blood attached in the urinal or on the stool. This is internal hemorrhoid bleeding without major local symptoms. Secondly, anal fissure bleeding is caused by dry stool, resulting in the rupture of the anal canal and a few drops of blood during defecation, or just a little blood on the hand paper. So it is more likely when the stool is dry, or when the anus hurts, the chances of anal fissure are also higher. Third, perianal fissure, poor local ventilation, tissue erosion, some blood when wiping with hand paper after defecation, and usually the symptoms of anal itching and pain. Fourth, perianal ulcers, simple ulcerated surfaces such as syphilis, skin lesions, ulcers, and blood on the hand paper, and there may be mucus. Fifth, anal fistula. There is repeatedly pus or blood overflowing from the external opening of the anal fistula, mostly slightly away from the anus. So locally you can take a picture with your phone or look under the mirror to see which is the case. If it is clearer in appearance, you will be able to judge it in general by yourself. It is best to go to the hospital for a more definite diagnosis.