What are the causes of small fiber neuropathy?

You name it!: if you can think of it, its probably a cause of SFPN. Some high on the list are: Alcohol use, medications, diabetes and insulin resistance, vitamin deficiencies, autoimmune disease... although there are multitude of others!

A bunch of things: The most common cause I this country would likely be diabetes. However, the list of possible causes is very large, some examples idiopathic (we can not find an answer), thyroid disease, certain toxin exposures, vitamin deficiencies, injuries to the distal (far end) of the nerve, and genetic disease just to name a few. A good thorough work up often, but not always finds the answer.

See below: Diabetes and glucose intolerance are the common causes and there is a long list of other causes. Please consult this article for additional information. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3086960/