Hi Ray, I also have idiopathic small fiber PN which really started in my 50s and I'm 80 now. Started with numbness in my toes on both feet and gradually worked up into my feet and lower legs over the years. My PCP told me it was probably neuropathy but with numbness there weren't any treatments that were going to make the numbness go away so I didn't bother with getting a diagnosis until I started worrying about the progression in my early 70s. Progression can be slow like mine was or like others have shared happens overnight. My own opinion is that the only thing that we can do is make lifestyle changes that will possible slow or stop the progression. I do think exercise and a healthy diet are a big help along with what you are doing... learning as much as you can about the condition. Kudos to you!