So I have this bump under my boob that showed up last Thursday out of nowhere. It started out small but painful, but having been working a lot, I’ve been having to wear my bra a lot which is irritating it more because my underwire sits right on it. I figured it was just a hive from all the pollen in their air lately, since I’d been getting them all over at random. But this one has stayed longer than the rest. And it doesn’t have a hole like a big bite or a pimple. Has anyone else experienced this? Any idea what could be causing it?