Or, better yet, get a copy of the test results and tell us exactly what it says?
Reason I ask is that skin biopsy, as opposed to nerve biopsy, typically does not sample myelinated nerves; it generally samples the microscopic "free" nerve endings, the small unmyelinated nerves that subsume the sensations of pain and temperature.
On the other hand, NON-length dependent neuropathic patterns are typical of the neuropathy of Sjogren's and some other neuronopathies/ganglioneuropathies:
http://neuromuscular.wustl.edu/antibody/sneuron.html