I know about the itching and burning. It seems a long time since the shots to make a correlation. Do the doctors know what caused the neuropathy? Sometimes they can guess. Neuropathy is one of those fields that is evolving. For people and like and you, it is frustrating to be told that they don't know the causation and that the symptoms will only get worse. Still in my case I was able to lose weight, drop and A1C, and thereby have some reason to believe that I was delaying the onset of more severe symptoms. We do all we can to mitigate! Try that!