Anal hair growth is a normal physiological phenomenon, and men usually have thicker anal hair than women. Anal hair growth has a lot to do with the human body’s endocrine, the patient’s excessive secretion of androgens will lead to the growth of thick anal hair. Anal hair can keep the anus ventilated, but also isolate bacteria, preventing the anus and rectum from being infected by bacteria. It reduces friction on the buttocks when walking and protects the folds from less wear and tear to some extent. However, if the anal hair is too dense, it will lead to moisture in the anus, triggering perianal eczema, and will also lead to bacteria attaching to the anal hair after bowel movement, which is not conducive to the patient’s health. Patients should pay attention to the local clean, wash every day or use potassium permanganate solution for sitz bath. Patients who do not want to wash every day can also use hair removal cream for regular hair removal, or go to the hospital through laser surgery for hair removal.