Hi, I'm a 15 (almost 16) year old male, recently I've noticeHi, I'm a 15 (almost 16) year old male, recently I've noticed a slight pain and sensitivity to my right nipple, when I rubbed it I discovered that there were a few lumps underneath it, and the whole area underneath the right nipple feels hard and tense compared to my left, I'm a little worried, should I be scared? Too embarrased to approach a doctor and say "RUB MY NIPPLE", please help.