It Is a symptom: Hypersomnia (sleeping too much) is itself a symptom of many illnesses ranging from depression to under active thyroid, anemia, narcolepsy, sleep apnea, anemia, and many others.
Answered 6/18/2015
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Hypersomnia: Excessive tiredness sleepiness attention problems cognition.
Answered 8/25/2013
4.9k views
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