Would a course of steroids and the relief of it tell you that it may point to a spine/nerve issue Vs SFN ? Just wondering as I too have a polyneuropathy [unknown sfn] I did not get a biopsy but I did have a bad cervical issue 2018 with a lot of pain and turning my neck in certain positions would cause hand numbness, I did a course of 10 day oral steroids which cleared it up completely for about a year, but as of a few months back my neck gets a little sore so I do a lot of stretches. Just wondering about the steroid thought?