I mentioned this before - Just want to mention it again -I hope I don't sound like a broken record

If you had or have primarily - hand, arm, shoulder, neck, upper back pain or a possible repetitive strain injury {hand /arm RSI = Carpal/Cubital tunnel, tendinitis etc }.

Please read some of the links about thoracic outlet syndrome {TOS}
just to help make sure - many of the sx can overlap.

But if you happen to have a structural nerve or vascular compression - it most likely can be repaired.

TOS useful sticky thread - http://neurotalk.psychcentral.com/showthread.php?t=84