It's entirely possible you have small-fiber neuropathy symptoms traceable to B12 deficiency, although usually B12 deficiency will attack the spinal cord and larger nerve with myelin sheathing first.

What kinds of diagnostic testing have you had? It's been many of our experience that many doctos are not familiar with the range of testing for neurological disorders--central or peripheral. Moreover, few know that a serum B12 level is not the most reliable indicator of B12 deficiency (MMA and homcysteine levels are better). Besides, the range for "normal" B12 levels given at most US and Canadian labs is probably way out of date (most labs here give values in the 200-1100 range; in Europe and Japan, the low normal range starts at 500 to 550 and often there is no upper limit. as B12 has no known toxicity level).

Come on over to the Vitamin/Mineral/Supplement forum--temendous amount of B12 info and links there (among other things):

http://neurotalk.psychcentral.com/forum49.html

You might also benefit from a look at the Gluten/Celiac and Peripheral Neuropathy forums, where this topic is discussed frequently:

http://neurotalk.psychcentral.com/fo...prune=100&f=13

http://neurotalk.psychcentral.com/fo...sprune=-1&f=20