I'm a dentist who has pretty bad cervical and upper back pain. I've discovered a position that actually does provide significant relief.
When I'm sitting down (It can work standing up as well), I rest my upper arms on something. I usually place two small pillows on my armpits, then let my upper arms relax on them. I feel the extended position of my arms helps a lot.
As I said, I'm a dentist. My area of expertise is the mouth, not the back. The relief I have found in this position fascinates me. Can anybody explain to me why this helps? I would like to know what is going on in the upper back musculature. If you can provide a link with some diagrams that would be great