(HealthDay News) -- Chronic fatigue syndrome is a complex disorder that involves extreme tiredness that doesn't go away after rest or sleep. The cause hasn't been identified.
The U.S. Centers for Disease Control and Prevention mentions these common symptoms of chronic fatigue syndrome, which should be evaluated by a doctor:
- Flu-like symptoms that may come and go, accompanied by weakness and extreme fatigue.
- Fatigue for longer than 24 hours, even after sleep, and after exercise.
- Aches and pains in the joints and muscles without redness or swelling.
- Headache, typically of unusual severity or pattern.
- Sore throat.
- Tenderness in the lymph nodes of the neck or underarms.
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