hey kim

i´m not sure but i think you are talking about a ganglion shot with a local anasthetic or a permanent lysis of the nerve
i have rsd in my right foot and had a lumber block done a few month ago, i was worried because i too had two surgeries before, which provoked my rsd
but the block and the pain meds helped at least a little bit (and every little bit is worse everything)
but i think you should talk about your fears with your doc, they cant see what you feel, and you should trust him so much that you can ask him your questions
i hope i could help you at least a little bit! if you have any further questions dont hesitate to ask
leiea