Anal hair is a normal physiological phenomenon, mainly related to one’s genetic factors and living environment, but also susceptible to the influence of one’s own hormone levels. The hair around the anus is physiologically known as anal hair, and anal hair actually has a relatively important role to play in the anus. First of all, anal hair mostly grows around the anus, which can effectively prevent external bacteria from stimulating the anus, thus playing a protective role for the anus. Secondly, the effective fluffing of anal hair can keep the air around the anus circulating and prevent a humid environment around the anus, while effectively reducing the parasitic growth of bacteria and microorganisms. Not everyone has anal hair in their lives, and the number of anal hairs on each person’s body varies, so if there is a long hair around the anus you can leave it alone.