Initially, I was labled with peripheral polyneuropathy. Then neuro #2 dx SFN, now with a normal skin punch biopsy, so I'm still in limbo. They know I have neuropathy with altered sensations, but not which kind. I'd hope to get some blood tests for heriditary causes, but current neuro just wants to wait till the new year to zap me again a gazillion times and to tell me again, what he thinks. I would really like to know what it is so if it can be treated, I'd like to do that as well. But...my doc just focuses on the burning and apparently, not much else.