We've all been there: you're going about your daily routine when suddenly, there's an angry red bump looking at you in the mirror. It's red, it's painful, and it may have a white tip in the center.

Medically reviewed by Marisa Garshick, MD A boil, also known as a furuncle, is a swollen, pus-filled growth on the skin that occurs when bacteria—even those normally found on your body—infect a group ...

That tender, angry bump in your armpit started as a tiny annoyance. Now it’s a throbbing, painful mess that makes putting on deodorant feel like torture. If you’ve dealt with armpit boils, you know ...