I hope that this question is not out of line for this forum. If so, my apologies. I've recently been prescribed medicine that, among other side effects is a chance of causing gynecomastia. Since I've started taking it I've noticed that I often have a strange sensation in my breasts. My nipples become very sensitive, almost irritated for no apparent reason. It hurts to have them rub on my shirt. I've not seen any changes in the size or shape of my breasts but I wondered if the sensations that I am experiencing are the beginnings of some breast development? In the past my blood work has shown my testosterone to be on the low side of the spectrum for a male and my estrogen has historically been on the high side of the spectrum. For any of you that are on HRT, am I experiencing the symptoms associated with breast development?