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 ...

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

which help provide sensation and allow movement of the upper arm. Nerve pain is usually radiating, or travels from the armpit to another part of the body, and can feel electrical in nature ...