Muscle strain : You may have injured a muscle or strained one. When you put on a shirt you have to twist the arm and in the process if there is an injured muscle it will hurt. If it doesn't get better see your doctor. Maybe you can remember doing something to injure the arm or to strain it.
Answered 3/26/2013
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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
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