The anus refers to a line in the scrotum which is a normal anatomical structure and is present in everyone, except that some people will be more obvious and may be higher than the skin, while others may not be obvious. If there is no specific discomfort, it does not need to be taken care of and does not require special treatment. The area where this line is located is called the perineum, if there is local pain with itching may indicate local infection, you can use potassium permanganate solution according to the quality of 1:5000 and water ratio sit bath, twice a day, each time about 5 minutes, local red, swelling, pain can be used topical Bactrim ointment to control the symptoms. You should pay attention to a light diet, keep your bowels open, and pay attention to the cleaning of the anus and perineum after the bowel movement.