Painful armpit lumps are often due to a swollen axillary lymph node under the armpit. This is usually a sign that the body is fighting an infection, but it can sometimes indicate cancer.

Medically reviewed by Casey Gallagher, MD Armpit rashes often develop due to allergic reactions, infections, and chronic conditions. Rashes are common under the arms because the skinfold creates a ...

Recent medical reports show a concerning trend of painful armpit boils linked directly to ... That tender, swollen bump forming under your arm isn’t just an inconvenience—it’s your body ...

armpits, and groin. A swollen lymph node may be painful and tender to the touch. In some cases, it will be visibly enlarged under the skin, but in others, it will be smaller or deeper in the body ...

After a while I began to get small painful lumps under my armpits about once every two weeks or so. They last about a day and then disappear. I started using deodorant again but I keep getting them.