Hi Spunkymom: Like Lj said, this is something not familiar to me, either. But, yes, you know how odd fibro can be, and how it can vary from person to person.
You maybe already have read this, but I'll post it in case you haven't. I thought it was interesting:
fibromyalgia.newlifeoutlook.com/fibromyalgia-rash/I hope others here will respond, too. New to me! Hope you get some answers.