I'm not sure why they would want to do yet another (4th) EMG/NCS, unless there was some indication on any of the first ones that a problem existed...which it didn't seem to be the case.

They know the EMG/NCS cannot detect SFN, but they always start with this test and always seem to put up a fight to do the skin biopsy...which is the ONLY way to assess those small fibers.

With the allodynia you are experiencing now, I have no doubt the test will be quite uncomfortable for you. You should have a discussion about whether this is really necessary when you go on Tuesday.

Unless you have some sort of single injury to the spine somewhere that is causing all this widespread pain, I don't see how you can have a surgical repair of nerves all over your body. I'm not sure I understood your question properly...if this is what you were even asking.