pimple/boil on my labia minora?

what do i do? three days ago i started feeling this pain on my hooha. i didn't check it in the mirror at first until now. i had to spread my labia to see, it was white / puss-like and there was a small cut (i did wear liner the day it started hurting). it hurts like hell when i touch it and whenever i walk or sit improperly-i can feel it chafing. think it's best to leave it be? i don't wanna go to the doctor, plus i don't shave or wax, only trim.