I need to chime in. I've been on finasteride for almost three months now, and I can't feel any bumps. The nipples aren't burning or itching, either. However, there is one thing concerning me, and that is that the flesh around the nipples seems to be overly sensitive. Not sensitive as in burning, but tender.
Why do I know this? I have a younger sister who is into the "charming" habit of giving people purple nurples. (or as she calls them, "teety tweesters"). She gave me one four days ago on my left pec, and to my dismay, it continued to feel slightly painful if something pressed against it for days afterward, even very slightly at this point. Not bad pain, but a slight ache, a dull tenderness, like somebody hit you hard.
This does not sound like the kind of gyno-related sensation that you guys describe, but I would like to know if you think this is anything I should worry about. Again, there are no tangible lumps that I am able to find.
Incidentally, the sexual sides are long gone.
P.S. At three months I can't tell if my hair is benefitting. Fallout is exactly where it was pre-finasteride (approx. 200 a day), but still full coverage. I'm hoping for stabilization.