I have rsd in both arms since 1980 started blocks in 1985 when they figured out that I had rsd I'm been getting block done 3 on each side one the right next day do the left some have to go back an get it done 8-9 months, try not to get sedated it is just harder on your body, my Doctor will num up the area up first with a very small needle an then use the block needle with ultra sound to see where he going i have found that this way is a much better way to get them done. I just had my 100th block done an it is the only way I'm still here I pray that they work for you . Jerry if you want an more info let me know.