I had a similar problem. Went to the Chiropractor, he took me off of all caffiene, especially brewed coffee. Apparently the brewed coffee has other chemicals besides caffiene that mess up your muscles... bromium?? something like that. He put me prescription B vitamins, and walking. I got better in about a month. That was 10 years ago. Now, I can drink instant coffee and be fine.. but brewed coffee does me in, even decaffinated. If I drink brewed coffee or forget to walk a mile every day, it comes back. I have never taken the b vitamins again, so I don't really think they were necessary. Walking at least 1 mile at one time, meaning a straigt walk, no stopping, is the only therapy I have been using. I have been doing re-bounding, but that causes the numbness to return if I do too much. I have had an mri of the spine and have no disc damage. Everything is intra-musclular. The spine is sending signals, but the muscles aren't recieving when I get the wrong chemicals in them. Maybe you have a similar reaction to it, or a different chemical.