The white spots on the anus are considered to be caused by the following conditions: 1. It may be caused by perianal eczema, mainly due to the increased secretion in the anal canal, making the anus moist for a long time, and the skin around the anus is stimulated to form eczema, which will cause the skin around the anus to change color, as well as with itching and painful sensations, and after scratching, there may be local skin ulceration, oozing, inflammation, etc. 2. The skin of the anus may be albino, which is an uncommon clinical skin disease, there will be localized skin white spots, and there is no regularity. 3, may be vitiligo, there will also be dotted or patchy skin white changes, no pain, no itch. 4, may be local skin wounds, wound recovery period appeared white spots. Once this happens, it is best to go to the hospital in time and do a detailed examination before targeted treatment.