Ok there has been this bump on my outer labia, and it's a lot like a pimple except that it gets HUGE, red, and it's very very painful when it's irritated. When it's not irritated it's colorless and slightly raised, and it doesn't hurt at all. I've tried popping it like a pimple but blood and very little white puss comes out. I read online about it could be a small infection from cutting yourself while shaving?? I've had it for a while and I don't know what it is, please help!