This is a very interesting article, although I haven't found whatever articles this one is based on. It describes a condition that could be the underlying vascular dysfunction that results in Fibromyalgia, but it still doesn't answer the question of what causes this dysfunction. Seems to me that if it's a vascular problem, the trigger is most likely an infection or a toxin or perhaps a combination of both, along with a certain genetic type of immune system.
There are articles from Aug. of this year describing how about half of fibro patients have small fiber nerve damage, which is also suggestive of a vascular problem.
http://c.washingtontimes.com/neighborhood/steps-authentic-happiness-positive-psychology/2013/oct/17/fibromyalgia-solved-pathology-not-mind/
I expect they'll eventually find multiple triggers, which could easily include Lyme or Bartonella.