OA and RA -- osteo arthritis and rheumatoid arthritis
Do you notice if you have forward head posture, or forward/hunched/rolled shoulders? Viewed from the side in a mirror? or ask a friend..
Those postures can close/pinch/impinge the area where many nerves and blood flow to the arms and hands..
Also does your armpit feel tight or puffy?
Neck muscles tight or burning, same for upper back?
http://neurotalk.psychcentral.com/album.php?albumid=422