Suddenly very sore nipples in men are associated with nipple infections, mastopexy, and tumors. Breast-like diseases tend to occur in women, and men should also pay attention when their nipples are sore and check themselves first. If the nipple is traumatized, it can cause localized stinging pain, the nipple can be damaged or cracked due to external forces, the damaged nipple can be infected with bacteria, which can cause local inflammation, and the bacteria can enter the breast ducts and cause breast hyperplasia, and bad habits or other factors can lead to disruption of the hormone level, which can cause breast hyperplasia, and the hyperplastic mass can press on the nerves and cause pain in the nipple. When the nipple is painful, you should go to the hospital in time for examination, and you should exclude the chest tumor. Malignant tumors grow faster, and as the tumor gradually increases, it will cause nipple pain when it presses on the nerve or metastasizes.