Any trauma or any kind of injury in those areas recently or maybe in the past?

Some of it sounds similar to thoracic outlet syndrome (TOS) we have a forum for that where you can read more to see if it might fit for you.
http://neurotalk.psychcentral.com/forum24.html

useful sticky thread for TOS-
http://neurotalk.psychcentral.com/thread84.html

Generally the c spine would be checked and if no issues there then TOS may be looked at more closely.

Have you ever caught a falling patient? Or often lifted moved them with poor positioning for you? In the past other nurses did aquire TOS from those exact things.