If nipple pain occurs in the chest, if the pain is brief and not recurrent, it is considered to be caused by episodic nerve irritation and does not require special treatment. If there is periodic or long-term nipple pain, the following causes should be considered: a. Nipple pain caused by physiological periods, mainly menstruation and pregnancy, due to the influence of hormones in the body, nipple pain, often accompanied by the swelling and pain of the entire breast area. Second, the nipple is inadvertently damaged by external forces, resulting in pain caused by surface skin breakage. Breast diseases, such as mastitis, breast cancer, breast cysts, etc., cause local pain. In addition to long-term nipple pain, these cases are accompanied by breast swelling, nipple overflow, redness, swelling and fever. It is necessary to make a good distinction and go to the hospital for treatment in a timely manner without delay.