1, perianal eczema: perianal eczema is a common non-infectious skin disease, lesions are mostly confined to the skin around the anus, but also occasionally spread to the buttocks, perineum and clitoris, local rash, erythema, erosion, exudation, crusting, desquamation. 2, perianal warts: two categories: perianal condyloma and perianal flat warts. The skin of the perianal area is wrinkled and there is a lot of friction when walking, so once warts occur they often produce perianal warts. The first thing that you need to do is to get a good idea of what you are getting into. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The discharge often has an unpleasant odor due to secondary infection. The perianal flat warts are caused by infection with syphilis spirochetes. 3, hemorrhoids: hemorrhoids is the bottom of the anorectum and the anal mucosa of the venous plexus varicose and formed one or more soft venous mass of a chronic disease.