Pain in your left arm can have many different ... There are four muscles that form a cover for the top of the humerus (bone ...

Arm pain is a common experience with many possible causes. Acute injury, overuse (wear and tear), and underlying conditions ...

It's normal and common for your arm to be sore after getting a flu shot. Your symptoms may include pain, swelling, or redness where the shot was given. This happens because of the injection itself ...