Originally Posted by Jo*mar

With your work, do you also have to reach out or up and lean over quite often?
Is your head and/or shoulders forward of the center of your body from a side view? From the side - generally the ankles, knees, hips and shoulder/head should all line up fairly straight.
Do you have any neck pain or ongoing tightness, any upper back pain or tightness?

If so you may want to visit out TOS forum ( Thoracic Outlet Syndrome) it is often a factor with multiple/ongoing/chronic repetitive injuries.
useful info sticky thread -
http://neurotalk.psychcentral.com/thread84.html
main TOS forum threads -
http://neurotalk.psychcentral.com/forum24.html

There is a overlap of some of the sx of MS also with TOS as the nerves are affected, but a different causation.