it's impossible to say what's going on without a physical examination. i suggest you make an appointment to see your primary care provider or your gynecologist. breast cancer can cause nipple soreness so it's not something you want to ignore (even if you're a man). another common cause of nipple soreness is called "runner's nipple. " this occurs when the nipple becomes irritated due to clothing rubbing across it repeatedly. this chafing can cause the nipple to become red inflamed and very tender. you don't have to be a runner to have this happen; any constrictive clothing can cause it from tight bras to t-shirts. you can treat runner's nipple by gently cleansing the nipple applying lotion and then putting an adhesive bandage over it to protect it from chafing. wishing you well!
why do i have reoccuring pain and swelling in my left nipple? . for the past year or so only my left nipple will swell up and become painful and tender to the touch for about a week and then the swelling and pain goes away for about a month and then comes back again but only my left nipple.