Mine was likely caused by B6 toxicity due to a a multi vitamin I was taking.. As soon as I stopped it, my B6 levels decreased dramatically. But by then, the nerve damage had been done. In my case, I just may have not yet found the right program with my SCS device since there are hundreds of program combinations available. If you do get one, I suggest writing a daily log as to what your pain levels are with the device activated. Otherwise you won't know which program works best for you.