Unfortunetly I don't think anyone on the boards wants to speculate what may be wrong w/your arms. I've had "diagnosed" Neuropathy for 3 years now, mostly in my legs. But due to my occupation as a Data entry clerk for 15 years I am now feeling it in my arms too, in the form of pinching and burning.
The neuropathy in my legs has progressed into different areas.
Cronic pain just has a way of waring on one.