Many possibilites: The causes can include musculoskeletal problems from the shoulder, neck or upper arm(humerus). One of the most common causes is a rotator cuff problem. Other possibilities include cardiac conditions, and nerve entrapment problems.
Answered 1/10/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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