CFS,fibromyalgia, multiple chemical sensitivity, and a few other ailments are believed by some to all be mercury(or other heavy metal) poisoning.

I think the key to all this is to increase intake of iodine, magnesium, and sodium, to help excrete toxic metals, and help suppress candida. Herbs such as cayenne, garlic, turmeric, echinacea and goldenseal also help, as does chelation.