There are three main conditions that can cause pain in male nipples when touched. The first is nipple trauma, with a clear history of trauma to the chest, manifested as redness and swelling of the nipple and can be accompanied by pain and discomfort, the surrounding skin can have scattered in the points or in the spots. Second, physiological reasons, because the nipple is rich in nerve fibers, so when the nipple is cold or sexually stimulated can reflexively become hard, when touching the nipple can appear pain. Thirdly, male breast development, the cause of which is mainly related to the increase in estrogen levels, manifested as a hyperplastic breast lumps can be touched under the nipple, accompanied by swelling and pain, when the pain is obvious can be spread to the nipple, the phenomenon of pain when the nipple is touched. In conclusion, there are many reasons why male nipples are painful when touched, so you should go to a regular hospital breast surgery department in time to identify the cause of the pain and actively cooperate with the specialist.