The painless ones may be polyps or hemorrhoids. For polyps and hemorrhoids can be identified through the traits of the swelling, clinical manifestations to identify. 1. The character of the swelling: if the swelling is a polyp, most of them are with the tip, spherical, good mobility, the tip, such as too long can be out of the anus outside. If the swelling is hemorrhoids, it is a hemispherical mucosal bulge, without the tip, the surface is attached to the rectal mucosa. 2. Clinical manifestations: polyps and hemorrhoids in the clinical most common clinical manifestations are painless blood in the stool, polyp blood is small, painless, blood is often attached to the surface of the stool. And hemorrhoids bleeding more, painless, blood and stool separation, often can be manifested as blood dripping after stool. If you find an anal swelling, you should consult a specialist in a timely manner, to be differential diagnosis, as well as to give targeted and reasonable standardized treatment.