 The central hypothesis is that stress such as temperature or diet will activate brown fat. Patients with fibromyalgia will have greater activation or volume of brown fat. Neuralgia related to stress may be the etiology of the pain. If this hypothesis is proven, there are several drugs on the market that could be deployed to correct these patients problems. Therefore, this project, if successful, will lead to clinical trials of these drugs in fibromyalgia patients. 