Cysts (fluid-filled tissue pockets), infections, and swollen lymph nodes commonly cause armpit lumps. Finding a lump in your armpit can be worrisome, especially if it hurts or appears unexpectedly.

Reaching for that stick of deodorant might be second nature in your morning routine, but dermatologists are raising red flags ...

They also felt a lot more sore than a pimple. Over time, I experienced these types of bumps under both armpits, under both breasts, and along my groin. Still, I didn’t pay them much attention at ...