I'm really worried about my boyfriend. He developed this small bump in his upper pubic area that looked like a pimple at first. We assumed it was just an ingrown hair. But it's been really painful and just keeps getting bigger. Now it's about the size of my fingertip, bright red, and the center looks hollow, almost like something's eating away at it. We're not sure if it could be a bug bite or what. Do you have any idea what this might be and how we should handle it?