The anal hair is a normal physiological phenomenon, and usually men have thicker anal hair than women. Anal hair has a lot to do with endocrine secretion in the body, and too much androgen secretion in patients will lead to thick anal hair growth. Anal hair can keep the anus ventilated and also isolate bacteria to prevent the anus and rectum from being infected by bacteria. It reduces friction on the buttocks when walking and protects the folds to a certain extent from less wear and tear. However, if the anal hair is too dense, it can lead to anal dampness and perianal eczema, and it can also cause bacteria to attach to the anal hair after defecation, which is not good for the patient’s health. Patients should pay attention to local cleanliness and wash daily or take a sitz bath with potassium permanganate solution. If you don’t want to wash every day, you can also use hair removal cream for regular hair removal or go to the hospital for laser surgery to remove hair.