Hi baby!

Which limb is affected by rsd/crps? It's very good they are treating it in early stage, that is your best hope for improvement or remission. That and youth.
I've had a total of 6 nerve blocks in my neck since my CRPS/RSD in in my left hand.
I had never heard of such a thing or had one before being diagosed so I was really scared.
It makes a difference what to expect depending whether it is an upper or lower extremity.
The results vary for everyone and each one of mine has a slightly different effect.
Basically they try to inject an anesthetic directly into the nerve in your spine that controls the specific limb. It does not numb it but it is supposed to block some of the pain signals between the brain and nerves.
It is a pretty quick proceedure but most patients opt for a light sedation.
You cannot immerse the injection site in water for 72 hrs. but showering is
fine so that's good.
Many good people on here can help and have experiences to share.
Best of luck to you, hope to see you post.