Having small bumps under your nipples during puberty is normal for boys, but it shouldn't get to the point where it's noticeable without feeling it. Are you on any medication? Stuff like growth hormones has been known to cause that kind of stuff. It could also be something like gynecomastia...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.