What is small fiber polyneuropathy in a patient with pots? is it progressive or fatal? what r treatments?

Causes: Small fibre neuropathy could be immune origin like sensory cidp, more often complication of diabetes, usually associated with "axonal neuropathies", not typically schwann cell process. Annoying, not fatal, but maybe progressive. Prove presence with skin biopsy, and may need ivig, but sometimes lyrica, (pregabalin) cymbalta, but maybe best metanx.