Flesh lumps on the nipple may be caused by physiological reasons, or may be caused by pathological reasons. 1. Physiological reasons: in the stage of pregnancy, many women will have breast enlargement or expansion of the end of the milk ducts, so there will be lumps on the nipple. There are also some women who do not pay attention to nipple cleanliness and hygiene, resulting in the blockage of sebaceous gland ducts in the nipple, which leads to the appearance of nipple lumps, usually without special treatment, and will gradually subside with the passage of time. 2. Pathological reasons: some women are due to their own physical problems, in the nipple will appear in the case of skin, which is manifested in the symptoms of nipple bumps, usually more common benign tumors, can be frozen or laser treatment. Some women may have nipple inflammation or ductal inflammation, which can be manifested as bumps on the nipple, and require medication, such as tetracycline ointment, to treat. Flesh bumps on the nipple, it is important to seek medical attention to identify the cause and treat it.