Here is a post of mine from a few days ago. All of my blood tests and MRIs were normal, however, a skin punch biopsy that I pushed for was positive form small fiber neuropathy in my left foot where my symptoms started. Obviously I am not cured yet, but I am going to Mayo Clinic in 2 weeks where they will hopefully be able to put it in remission. I would push for this biopsy test as most EM has been recently shown to be a symptom of small fiber neuropathy which always has a underlying cause, it’s just a matter of finding it which can be difficult.