About 6 months ago I received an allergy shot in the back part of my right arm. I now am unable to move my arm in certain directions and you can actually, where the shot was administered, feel a knotted area when pressing on the area .... it actually sends shooting pains down my arm. Who do you go see about this type of pain and are there any cures? Is it a pinched nerve or perhaps a tendon problem? One of my friends thought maybe it has something to do with my rotator cuff but why would that be linked to a shot in the arm? I am thinking about going to an acupuncturist? Any ideas?