I also have nld sfn. My symptoms started seven years ago and after 2 years I had them better controlled but not by any means perfect and I had Covid at the end of June and I am burning from head to toe. I also have some difficulty with my hands. How are you? I started on cellcept. Initially my ANA was normal but has become high over the years. I now have an autoimmune disease that may be causing it. I was idiopathic for a while. It does seem as though Covid triggered it again.