This is great to bring up because it opens the door to anyone who has not had an extensive and thorough workup by their neurologist.

Every person diagnosed with SFN should have "the works" to determine your underlying cause. If you neurologist does not take this route then you have every right to ask for it, as long as you can afford of course.

My workup took 4 months to complete....from blood work to spinal tap. Leave no stone unturned.