First, let me state that i did hurt my back a few months ago and most of my nerve tingles (like being blasted by sand) are in my back, but all over as apposed to the back pain which is only in the middle. I also get them in my neck, the nerve tingles. I have upped my dose of B12 recently, and i wonder if its that? Anyone know? Anyone had the same? Is it a good sign, or a bad one? Or maybe its unrelated.