Fatigue can be a symptom of hundreds of medical conditions. All other possible causes of fatigue will be ruled out before chronic fatigue syndrome (CFS) is diagnosed. Exams and tests are used to rule out the most likely causes of fatigue, depending on the person's medical history and symptoms.
Chronic, persistent fatigue may be a symptom of various conditions, including:
Other possible causes of fatigue include:
Last Revised: April 22, 2011
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