There was a thread a week or more ago in which we had briefly discussed pain and/or numbness in the left arm area....
I had been experiencing it as well for a while. This weekend I used Aspricream w/ heat (half heartedly because nothing usually helps with my fibro symptoms) It not only helped but I have yet to have the pain return to the area....
I can not remember who posted about it initially, but I hope that you (and anyone else) see this post and give it a try. Hopefully you will be pleasantly suprised as well. :)