I know this post originated a couple of weeks ago, but I was searching for something else and came across it.
Spatzel, were you told that you had a granuloma annulare (rash)? I have several of these, and it sounds as if it might be what you are dealing with. It is an immune system reaction/response, and doctors don't really know what causes it. It is supposedly harmless. If you do a google search, you will find lots of info. about it.
I too wonder if it is somehow related to my fibromyalgia (or any of my other illnesses).
Hope you feel better soon.