I'm really sorry that you have RSD. Catching it as early as your doctor was able to, though, gives you the best chance for success with your treatment. I only got temporary relief from my lumbar sympathetic nerve blocks, but I was diagnosed a year and a half after developing RSD and everything I've read says that they have the best chance of working within the first few months. I really hope you get excellent and lasting results from these blocks, and I wish the best of luck to you!!