Medically reviewed by Theresa Marko, PT, DPT, MS Key Takeaways Armpit pain can appear with symptoms like tenderness, swelling, and redness. Causes include injuries, infections, or swollen lymph nodes; ...

Armpit pain is a common complaint that can have many causes, from mild muscle injuries to swollen lymph nodes and severe skin infections. In most cases, armpit pain isn't a reason to worry, but it can ...