I get this as well, mostly down my back and arms and hands, but sometimes in the legs as well. I've often commented that I feel like there's a cell phone set to vibrate lodged in my spine! It's also due to a cervical spine lesion for me. Actually it's probably the most often recurring of my flare-ups since my diagnosis. The one thing that has worked for me quite well is liquid sublingual B-complex, taken daily. My B-12 levels went from too low to too high in a fairly short period of time. But I feel better when they're too high, so I've decided to just stay with it anyway. (Note: by too high, I mean high enough to be flagged on the blood test results, but not so high as to cause any medical concern).