A lump in the anus, if it is hemorrhoids can be used externally hemorrhoid cream; if it is a perianal abscess can be used mupirocin ointment; if it is warts, can be used imiquimod cream. 1. hemorrhoids: poor perianal circulation caused by the protruding anus of the lump most of the accompanying pain can be used externally with hemorrhoid cream, usually should keep the bowel movement, the serious need for surgery and other measures. 2. perianal abscess: is due to the perianal gap purulent infection caused by local inflammatory reaction, can also cause the anus long a lump, can be used externally mupirocin ointment, erythromycin ointment, abscess more should be incised drainage. 3. warts: human papilloma virus infection caused by sexually transmitted diseases, may also grow in the anus, manifested as cauliflower-like papillomavirus, can be used externally imiquimod cream, onychomycosis tincture and other drugs treatment. Anus long a pimple, there may be other reasons, need to go to the hospital for examination, clear cause of the treatment as prescribed by the doctor.