Celiac Disease, if you carry the gene for it, can be triggered at any age. You may want to be screened again just in case. That said, of course, not all cases of SFN are from Celiac Disease. I just threw my suggestion out there because so many doctors failed to screen me. They figure I have had Celiac Disease for two decades (at least). It was only in recent years that I went on to develop the neuropathy. I just feel blessed that they did identify the cause as I am so vastly improved.