Many people have been misdiagnosed as having fibromyalgia when in fact they are mercury toxic. True fibromyalgia does not occur until one has chronic fatigue syndrome. True fibromyalgia always occurs after chronic fatigue syndrome sets in. Mercury toxicity mimics many fatigue related issues. A person with chronic fatigue syndrome will have a sodium level of 1 or 2 and a potassium level of 1. This is the prime requisite for the commencement of fibromyalgia.