--it might be a spreading small-fiber type neuropathy. And if it truly is a neuropathy of the small fibers, it will not be diagnosable from nerve conduction or EMG studies, which only measure the gross activity of larger, myelinated nerves--specialized testing would be needed (quantitative sensory testing, sudmomotor axon reflex testing, or skin biopsy to check condition and density of small-fiber nerves, the current gold standard).

About 30% of small-fiber neuropathies are linked to diabetes or impaired glucose regulation, but there are dozens of potential etiologies. And, unfortunately, over a quarter remain stubbornly idiopathic even after extensive testing (though autoimmune or toxic causes are often suspected in those cases).

I highly recommend you come on over to our peripheral neuropathy board and read, read, and read, as well as post (lots of knowledgeable people there):

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