I too have had 3 nerve blocks. I know the procedure itself sounds horrifying but the procedure itself isnt bad. Prior to the block the dr administers meds into an iv that includes a relaxing agent and pain medicine to enable the process to be as comfterble as possible. The procedure is a standard in treating CRPS but with that being said and if you deciede to go for it, make sure your dr is well qualified to do the treatment. If you are only interested in non-invasive treatments than i would reccomend declining the blocks and ask him to refer you to a center that offers non-invasive treatments such as ketamine. At the end of the day it's your body and you have final say as to what you will allow to happen to it as far as the treatments go. Good luck and keep me posted as to what you deciede.
Sarah