Annie if you get any answers could you let me know?? I started with buzzing in my feet about 4 yrs ago. I would get cold feet in winter ICE BLOCKS and had some burning. My issues are much like yours, I have had a nerve here or there buzz for days and have had muscle spasms as well in various areas on and off. This has now spread in arms and legs --I feel jittery and have the internal vibes as well. I have no explanation why except I do have a back that is not good. I sure would be interested to know if you get any answers. I also developed jerking in the am so having getting a brain MRI I do have migraines so think lesions will show. I am not getting one with contrast so hope what will show up will... Thanks