Armpit pain can be caused by many issues, from muscle strains to swollen lymph nodes. Here are possible causes of underarm ...

Swelling without pain may be a sign of a tumor. Under the arm, it may indicate that breast cancer is spreading. Swollen lymph nodes are usually a sign of an infection somewhere in the body.

But removing lymph nodes can cause lasting pain and arm swelling, so research is underway to determine when it can be avoided ...

But removing lymph nodes can cause lasting pain and arm swelling, so research is underway to determine when it can be avoided. A study in Europe last year showed that older women with small tumors ...