Interesting symptoms... So I guess with sensory SFN, you can eventually have small fiber nerve involvement, anywhere their is small fiber nerves? As far as starting in the feet and working it's way up, I had feet and hand burning pain right away, but I wonder if the years surfing in cold water accelerated the symptoms? I used to surf, until my fingers were frozen open, where I had troublemaking off my wetsuit, as I could not grab the zipper... I have also had problems with some vibrating power tools like jackhammers, my hands would start itching and go numb, this was long before I got PN...
The doctors always seem to jump on the cause of the PN, by saying it was my bloodsugar, even when I tell them of the 5 family members with symptoms, you would think Herditary would come up in the conversation...