We have had a number of topics on pain and pain control on this forum and this interesting article may have some relevance:

"Physicians who care for patients with chronic, diffuse pain that seems musculoskeletal — and involves many areas of tenderness to palpation — should strongly consider checking vitamin-D level," Michael Turner, MD, from the Mayo Clinic in Rochester, Minnesota, said in a news release issued Friday.

"For example," he added, "many patients who have been labeled with fibromyalgia are, in fact, suffering from symptomatic vitamin-D inadequacy. Vigilance is especially required when risk factors are present, such as obesity, darker pigmented skin, or limited exposure to sunlight."

Link to the article: http://www.medscape.com/viewarticle/590151

More info on Vitamin D http://www.viddler.com/explore/mercola/videos/135/

The biggest bang for your health care buck.