Or try searching "Hidradenitis Suppurativa"
How big is it? I had something very similar, about the size of a marble. You should check out this site and go see your doctor.... http://womenshealth.about.com/cs/dermatology/a/sebaceouscyst.htm
Good Luck!
Hey, I feel ya. Even though you haven't shaved in a while, it sounds like it is a nasty ingrown hair that turned for the worse. I get them *unfortunately* frequently even when I don't shave. Best advice I've been told is to put a warm compress on it and try to pop it. Gross huh? Hope this helps.