I'm 19yo (almost 20) and I'm in a relationship from over 1 year with a girl. We had our first sexual experience together and only after 5 months but this moment was the moment in which, (or, to be precise, two months before that we did our first experiences) I discovered what the hell my foreskin was supposed to do.
Blame my parents, my medic, my teacher and the rest of those bunch of idiots, but I wasn't aware (18 at the time) that I was supposed to pull back my foreskin to... well, jerk off.
This resulted in a quite shitty first time for us (not penetrative sex, only manual and oral sex) but I put my mind in doing stretching. Now, I'm able to retract way more but still not enough to expose complitely the glans, but this is another matter, infact I was thinking to go to the doctor to ask if I should just go on with the stretching or help it with something else.
Anyway, 2/3 days ago, during the daily stretching i pull the foreskin a lot and noticed that the part of the glans I exposed in that moment was RED. A lot red.
I am quite worried about it, but it didn't see nothing important, it was just...red.
P.S. Oh well, I should say that I was just after I masturbated, because it's easier for me to do longer streching after it.