Hi
I have had crps for 23 years, In may 2012 I had a sympathectomy. It is honestly one of the worse things I have ever done for quite a few reasons.
I had injections just above my right hip, I had crps in my lower right leg and arm. I recived nerve damage to my hip and the crps spread up my leg, I also have permanent pain in my right hip. Also I had servere headaches after the sympathectomy and had to have a blood patch. I had spinal cord fluid taken to rule out infections, for some reason the dr struggled to get the needle into my back I ended uo with 10 seperate entry points for the needle. And you guessed it the crps spread to my lower back where the dr had tried to get the needle in.
Apart from all the issues from the treatment I had no relief from the symptoms after the sympathectomy. From what I understand it is not a particularly good course of treatment. A friend has also had it although she had no side effects it did not work for her and she felt it to be quite a traumatic experience. I really don't want to scare you but I think that it is best to be honest. Do the research and make the disicion which is best for you
good luck