I had horrible small fiber neuropathy and the doctors couldn't figure out what it was. I suffered for years, the last 6 months being horrific. Finally, a dietician said she thought it was a food sensitivity, possibly celiac. It took many months to figure out how to eliminate every last spec of gluten from my life. The better I did with avoiding gluten, the better I got. It took months but it was worth it. At my doctor's suggestion, I have also recently eliminated all grains and that has helped reduce the pain further. Now I am only mildly bothered by it.