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

A rotator cuff tear can make arm movements difficult and cause a dull ache in the shoulder that worsens at night. The injury ...

When the movement of the shoulder is impeded by poor posture, you are more likely to impinge the shoulder tendons. Repeated ...

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 ...