I really hope you find something that gives you some relief. I totally agree with the others on here who have said "why keep doing them if they aren't working?". My RSD didn't spread until after my second nerve block. Within days of the effects wearing off, it spread up my leg and into my knee. My doc said he doesn't do more than a two or three if they aren't working. He said some doctors will do 20 or 30 of them, and there is NO reason for them if the first few didn't have the desired effect. Talk to your doctor and tell him/her your concerns about continuing the blocks. Good luck.