My Small Fiber Neuropathy is due to Lyme and / or Bartonella.
I would strongly recommend doing the "Advance Labs" Lyme blood culture test, as it is more accurate than the Igenex Western Blot (which still misses 30% of positive cases).
Here is the website for Advanced Labs:
http://www.advanced-lab.com/spirochete.php
Best of luck!
David Frohman