This has happened 1 or 2 times before in the exact same location. I get a very large (1cm or less total area including redness) whitehead pimple near my crotch on my inner thigh. I've popped it like a regular spot the time it happened before and it went away, but since it's come back, I'm wondering if I should be worried? It has a lump but that goes when it pops. Is it just a hair follicle or something? Doesn't really cause any problems besides it hurts like a large pimple tends to.