 The hypothesis of this study is that biological markers are present in the body that are good indicators of chronic pain. Eligible participants will be assessed at baseline and after receiving a series of acupuncture or sham acupuncture something that resembles, but is not, active acupuncture sessions. If the subject qualifies for the investigators research and are subsequently enrolled in this study, they will be randomly assigned like the flip of a coin to one of these two groups. Acupuncture, as previously shown by this group, leads to improvements in both clinical and evoked pain associated with fibromyalgia. The study involves two magnetic resonance imaging MRI brain scans, one at the beginning and one at the end of the study. Another optional portion of the study would involve 2 PET positron emission tomography scans of the subjects brain, one at the beginning and one at the end of the study; this type of scan allows us to get more specific information about the subjects brain function during an acupuncture session. 