The one person I knew who had it done wished every day she'd not done it. IMO, it's a barbaric procedure to begin with and has been shown that not only does it NOT help, it makes things worse. The person I knew had a few months of relief, but she woke up one day completely unable to move. She was in such agony she wanted to die. Getting a sympathectomy, for her, made it go full body and the pain she felt more pain that ever.
The risk is one I personally wouldn't take. There's too much risk and not enough gain.

Hugs,

Karen