It has been almost a month now since i noticed a soft lump directly under my nipple. I've seen other forums on this topic that say it has to do with puberty and hormones. I am 21 years old and have been strict on working out the last few years. It does hurt a little bit when pressure is applied. I have gotten a tattoo around it early this year, but it had no effect on it since then. Can someone tell me what this is and if it will go away? It is seriously worrying me. Thanks a lot for any feedback.