Anal hair growth is generally a normal manifestation of the human body, if the anal hair is too thick, may be abnormal. Hair growth at the anus is closely related to the androgen secretion of the human body. Generally speaking, due to the male secretion of androgens more, male anal hair growth is also more exuberant than women. In some cases, androgen secretion may increase in women, such as polycystic ovary syndrome and tumors of certain endocrine glands, which may also lead to excessive anal hair growth in women, and should be treated in different ways. If the anal hair is too thick, it can be trimmed appropriately to improve the discomfort and to avoid bacterial growth, thus avoiding the development of infectious inflammation. If inflammation has already occurred or the hair has grown to the inside of the anus and cannot be treated on its own, it is necessary to go to the hospital in a timely manner.