What about tension? Also, our posture can lead to discomfort in this region. Frozen shoulder? Do you do any exercise at all?
Hello~I know this was posted in December, I hope you are doing better. I would suggest seeing a chiropractor for these issues, you may have some pinched nerves causing the trouble. The chiropractor will take some x-rays, study them and then go over the results with you, after a few treatments you should start to feel better. Also, a good therapeutic massage or acupuncture can sometimes help.