vaginal friction boils

okay, so I know for a fact I have no STD, or STI problems. so please dont bring that to attention. okay, so I dont wear underwear often, and because of the friction, i get boils or blister like things on my vagina, or around it. am i the only one that has this problem? my boyfriend and I haven't had sex, so he doesn't know I get these at times. well, I've had one, and I have a scar where one was, usually they dont leave scars but this one did, and I dont know if I'm the only one who has this problem or not. and this is something I'm very insecure about. any advice? how to get rid of scars? how to deal with them? how to tell my boyfriend? any advice would help❤ thanks