RFA is not supposed to be a good treatment for RSD. (to put it mildly)

I suspect that some people have nerve fiber that is less resistant to being damaged by sharp objects than others. I've had needles hit nerves twice now while doctors tell me it's impossible.

One was after I had the RSD and it spread to that site. It's not a particular problem so far as I can tell but it still feels like the needle going in from time to time.