I know a lot of my gothy friends have various backaches and the like... This article at Slate suggests that Vitamin D deficiency may be to blame for such problems in many cases:
[In a study] published in 2003 in the Mayo Clinic Proceedings, researchers in Minneapolis tested vitamin D levels in patients suffering from chronic, non-specific, musculoskeletal pain: 93 percent of them turned out to be vitamin D deficient -- a condition very likely (though not conclusively) related to their symptoms. And of the East Africans, African Americans, and Hispanics in the study, 100 percent were vitamin D deficient.
I know, correlation isn't causation, but... yowza!