Small-Fiber Polyneuropathy
Small-fiber polyneuropathy (SFPN) is known to be caused by specific medical conditions, some of which can be treated and can sometimes be cured. SFPN is a type of peripheral neuropathy occurring from damage to the small unmyelinated (unprotected) peripheral nerve fibers in the human body. These specific fibers are categorized as C fibers and are present in peripheral nerves, organs and human skin.
It is estimated that 15-20 million people in the United States suffer from some form of peripheral neuropathy.
A recent study into Fibromyalgia has shown that half of people suffering from Fibromyalgia have SFPN (http://www.sciencedaily.com/releases/2013/07/130730163138.htm).