Is there anyone that could give me any input on my idiopathic small fiber peripheral neuropathy. Had it 10 yrs. now and I can't take it any more. I tested negative for everything except when the doctors made 2 skin biopsies, which came back as SFN. I tried everything and nothing helps. I think my face and my sinuses are driving me the most crazy. I can handle my whole body abnormal sensations but not the face and sinuses. There is no where to turn any more.