I had my first lumbar block after 2 year of rsd a month ago and it increased my pain. I had put it off due to that fear but after other doc before this one who again suggested it wanted to do more major like scs and my pain was so high I decided to try one. I guess of course I am not happy with it increasing my pain which lasted the flare up for a couple days it did give direction and now I am back trying meds again and a different approach and it also led me to the possibility that the scs for me would also do similar to what the block. I have heard of people getting relief to where they are able to get active which is key with rsd. Can you see another pain doc to get another opinion? Have you tried any meds? I am sorry you are suffering and wish I had more answers