It sounds like you may have a rib out of place. You may also have a muscle in that area that's irritated - maybe your rhomboids, lat, or intercostal muscles. A gentle stretch where you reach up over your head to the side o
Can Whiplash of the Neck causeshoulderpain?by
up overhead to put on a shirt can causepain.
Sometimes whiplash sufferers have shoulderpain... and shoulderpain- think of other things that can be causing the pain in your shoulder.