I had the autonomic workup before the skin biopsy. Every test in the autonomic battery yielded an abnormal result....so then they did the skin biopsy.

Seems to me that POTS is a pre-diagnosis to the neuropathy......or does POTS exists in the absence of a + skin biopsy? Maybe I am wrong, but, lots of these diagnoses boil down to SFN.

Yes, I had abnormal QSARTS which are not the same as the Sweat Test....The thermoregulatory sweat test is as Glenn said, when they apply orange powder to you and bake you. As Glenn said, you are supposed to turn Barney purple. I stayed totally orange. Pretty strange. I DO sweat tho....when I am active I sweat, or if it gets super, super hot, with dangerous heat indexes I seem to sweat....so, maybe they didn't bake me hot enough?? It was so long ago, I dunno.

I would love to have another skin biopsy to see where this disease has gone in all these years.