Get a rest from being constantly tired with CFS check
China Daily | Updated: 2011-02-09 08:16
Fatigue is usually caused by too little sleep or overexertion and goes away with sufficient rest.
If it persists, however, it could be a symptom of what is known as Chronic Fatigue Syndrome (CFS).
CFS is a complicated disorder principally characterized by extreme fatigue, according to Fatigatio, a national self-help organization of CFS sufferers in Germany.
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