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

There are several nerves that run through the armpit, which help provide sensation and allow movement of the upper arm. Nerve pain is usually radiating, or travels from the armpit to another part ...

A dull feeling in your left arm could be from overuse or strain. Learn what causes pain on this part of the arm here and ...