I don't know but I have the exact same problem, mine are caused by suncream in the summer
I put antiseptic cream on mine, I put quite a lot on and I can feel it tightening up like a facemask. I done the wrong thing and tried to squeeze it which I now might have gave my spot a head, so I'm going to wait til the morning but put antiseptic cream on it, wash at night then before you go to bed put antiseptic cream on it and leave it on overnight, hopefully it works if you do it for a couple if days :D
oh and when washing your face use products that say things like reduces redness or prevents spots xxx
oh and when washing your face use products that say things like reduces redness or prevents spots xxx