All of my surgeries and minor procedures have been related to my RSD- nerve block injections and a SCS trial. I have never had a flare-up related to a surgical procedure (though flying for me is a completely different story).
I will be praying for you tomorrow- so that this doesn't increase your pain, and so that there is no cancer. I agree with the previous post, make sure to tell the anesthesiologist/nurse anesthetist.
Praying for you, that everything goes well. I am sure there are many others thinking positive thoughts about this for you too!
