From muscle strains, bacterial and viral infections, and skin rashes, here are 9 possible causes of armpit pain and when to ...

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 ...

Medically reviewed by Jennifer Steinhoff, MD Shoulder blade pain is discomfort in or around your shoulder blades. It usually ...

Your deltoid muscles make up a main muscle group in your upper body ... if you have severe muscle swelling and pain or can’t move your shoulder or arm. Overusing or straining your shoulder ...

"My shoulder pain wakes me up if I roll over on that side during the night." Those are two of the most common statements made by tennis players complaining of shoulder and upper arm pain.