Below is a link to a well written article from 2010 summarizing a study and offering citations of others investigating the benefits of Craniosacral Therapy for individuals experiencing the symptoms of Fibromyalgia.
"According to these results, craniosacral therapy can be considered a complimentary therapeutic approach to fibromyalgia."
"[CST] was found to contribute to a better quality of life in fibromyalgia patients."
No surprise, right? I mean, I'm not likely to post something that says what CST practitioners does is nuts. However, being a science dork, I'm interested in any data that helps to articulate and explain to clients what is occurring during and after my work. This article isn't just a chance to dress up CST - it is mentioned that the studies considered revealed a timeline specificity for treatment of this particular scope (benefits diminished after one year without treatment sessions) and that there wasn't measurable data for how CST influenced the autonomic nervous system (an element ultimately relating to symptoms of the cardiovascular system in fibro).
However, quality of life is pretty valuable thing. Each step towards an easy smile and options to participate more fully in life ought to be considered a victory.