Pain in your left arm can have many different causes, from injuries and muscle strain to a pinched nerve or sprain. In some ...

From your shoulders to your fingers, your arms have many moving parts: joints, bones, muscles, nerves, tendons and ligaments. Mysterious arm pain that seemingly comes out of nowhere can arise if ...

If we think about moving some muscles, like our arm muscles, they move. Other muscles, like our heart, move on their own without us thinking about it. Muscles often work in pairs, pulling on your ...