@sunrise11 If you are concerned about small fiber neuropathy issues, I got my diagnosis through an electro-cardiologist specialist. I was referred to him by my neurologist. I was experiencing lots of pain from no known cause as well as other dysfunctions and started with my PCP who referred me to a neurologist who referred me to the electro-cardiologist. The only problems there are that electro-cardiologists are so specialized, it takes some traveling to get to one. Mine was about an hour away, but I'm lucky to live that close to a big city with medical universities, so I lucked out. I hope you can find something like that for evaluation. Ask doctors about "sudomotor testing" - that's what led to the biopsies that gave me my SFN diagnosis.