After 3 months of getting mucked around with 7 GP'S and one rheumo that were all hopeless, then i got to see a neuro that knew his stuff, he told me on my first visit he suspected PN, after blood tests and a EMG & thermal testing, i think it was just about a week later he then confirmed it, small fibre damage with some large nerve involvement and told me the causes, i was so lucky.
Brian