A muscle causing pain in your body will often produce pain in an adjacent muscle.

This is what makes it so difficult to identify the actual source of your pain. For example, most neck and shoulder pain is felt in the Trapezius muscle, which travels from the top of your arm up into your neck. At NMPI we find that more than half the time the Trapezius is not the source of the pain. Rather, it is the Infraspinatus muscle, which lies on top of the shoulder blade. Treating the Trapezius in these cases, even though you feel the pain there, doesn’t get rid of the pain – treating the Infraspinatus does.