Anal hair growth and darker color around the anus are normal and do not require treatment. The anus, which is the lower opening of the anal canal and the final site of fecal expulsion, is morphologically presented as a longitudinal fissure running back and forth. The skin around the anus is darker in color and appears dark brown because it contains more pigment. At the same time, adult men have anal hair around the anus, and there are sweat glands and sebaceous glands distribution, these are normal physiological phenomena, do not need to be treated. The anus can play the role of a barrier to prevent bacteria and other bacteria from entering the anus. Since the anus is the exit of feces, it is easy to have fecal residue, and feces contains more bacteria, so compared to other parts of the body, the anus is a place to hide dirt. It is important to keep the anus as clean and dry as possible to avoid infections.