Thank you, this is helpful information. I did have an EMG test and an MRI test 4 years ago, and a biopsy for small fiber neuropathy performed by the neurologist at that time. Should I request, or can I have these same tests repeated again? Or, are the results I received 4 years ago, the formal official diagnosis, and no further testing is needed? I’m worried that this small fiber neuropathy has or can turn into something worse. ( I could be wrong, I honestly don’t know much about small fiber neuropathy and what to expect.)