I was diagnosed by my GP about 6 years ago and after he ran out of options he tried to refer me to Mayo in Rochester. I was turned down with a short trite note that they were unable to see where they could be of any benefit over what my family doctor had tried. Found that a little disturbing that my local doctor in a town of 7500 had the knowledge and resources of Mayo clinic but after talking with him again was told that idiopathic nerve issues are a needle in a haystack and Mayo would rather look at cases that are not quite so shot in the dark. His comment was, if the could perform surgery on you with a good chance of an outcome that would be good advertising you'd be in quickly. Good luck, I've not found any reliable relief for the burning and rocks in my shoes feeling and I look at everything new all the time.