Hypersomnia, also hypersomnolence, is excessive sleeping. It may lead to tiredness (excessive daytime sleepiness) and sleeping late. Differential diagnosis includes narcolepsy (sleep attacks), various sleep disorders, brain disorders, CNS disorders, and many other causes. One must also consider that it ...

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Simple Causes: Differential diagnosis of causes of excessive sleeping or hypersomnia include:

  • Normal sleep patterns. Some people sleep more than ...
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