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 ...

Pain under the left armpit may result from muscle damage or swollen lymph nodes due to an infection. However, it can also indicate a more serious problem, such as cancer or angina. The armpit is a ...

Pain in your breast and armpit can happen due to hormonal changes (like before your period, during pregnancy, or menopause), an ill-fitting bra, muscle strain, or mastitis, which is inflammation of ...