Identified in 1985, the chronic fatigue syndrome is an extremely low intensity for more than 6 months and resistant to rest. This disease makes it very difficult for any act of daily life and has no obvious cause. 

The chronic fatigue syndrome is a real disease. The patients suffer from profound fatigue that hampers their daily lives. The problem is that until this disease that was characterized by a diagnosis of exclusion.

We must be sure that fatigue was not an identifiable cause: physical or psychological, before identifying the chronic fatigue syndrome or fibromyalgia. But recent research may soon change all that: it was found in patients solicitation excessive immune system. The question yet to be identified: disruption of the defense system or viral, etc.. Blood markers may soon be diagnosed through a simple blood test.

All conditions have common symptoms such as fatigue. From iron deficiency to endocarditis through hypothyroidism or hepatitis C or AIDS.