The world is full of happiness and sadness. Diseases can affect our lives badly if we can't deal with it in a correct way. Some diseases are dangerous while the others are not. (1) In the past, the medical scientist discovered an illness called Nervous Exhaustion. Nowadays, the name of this disease has been changed into "Chronic fatigue syndrome. This syndrome is one of the most complicated disorder that may hit the nervous system of anybody, and it has symptoms, possible causes , and some slightly treatments that may reduce the risk of this disease. National Health Organization classifies it as a dangerous disease and its main causes are not clear yet. (1) This disease usually hits elderly people, especially woman who's their age around forty and fifty.
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(2) The word fatigue means the lack of energy and the continued tired, so It cannot get better even in the rest time, and it can limit the patient from doing his daily activity. There are some factors that can play a visible role to improve this disease such as the age, genetics, and other environmental factors. (6) The fatigue may get worse by activities sometimes. (6) The patient has to do many medical diagnoses to distinguish between this disease and the others due to the common symptoms such as Systemic exertion intolerance disease. The diagnoses must be taken if the ability to participate in daily activity decreased by fifty hundred percent. (7) This fatigue remains at least six months in the patient's body. (9) The capability for doing activity of people who are infected by chronic fatigue syndrome is lower than what they were before they became