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 ...

For the original video go ... their arm for some support here and sometimes that little gap in this area can help alleviate some shoulder pain if you are experiencing it. Brad: That's right ...

Shoulder pain is ... when the arm is extended away from the body," says Lamb. "Often patients will report a deep ache in the ...