I also have non diabetic progressive on I am 56 years of age just came on me overnight. I have no idea what could have possibly caused it , I suspect medication but I have no proof. Mayo Clinic said there is nothing they could do which left me devastated and depressed at first. It is extremely hard to walk, stand or just be stable at all on my feet but I still try. Yes I experience pain all the time as well but I stay prayerful that’s the only thing that has worked for me throughout this whole process is constant prayer. If you have any other questions that I can answer I have no problems with answering to the best of my ability. Have an amazing holiday and a beautiful and blessed week.