I just went to a new doc who is testing me for Celiac. I don't know that I have it but I was surprised to learn its link to PN.

http://www.neuropathy.org/site/News2?id=8201

Neurological disorders are estimated to occur in 6-10% of patients with celiac disease with peripheral neuropathy and ataxia being the most frequently described. The peripheral neuropathy associated with celiac disease is most commonly sensory and axonal. The small sensory fibers are frequently affected and a small fiber neuropathy can be diagnosed by skin biopsy. Sometimes patients can develop a more severe generalized or multifocal neuropathy with weakness and sensory loss or with autonomic neuropathy symptoms.