Sleep Disorders: Hypersomnia

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Quick GuideSleep Disorders Pictures Slideshow: A Visual Guide to Sleeping Disorders

Sleep Disorders Pictures Slideshow: A Visual Guide to Sleeping Disorders
The Cleveland Clinic


Introduction to Hypersomnia

Hypersomnia, or excessive sleepiness, is a condition in which a person has trouble staying awake during the day. People who have hypersomnia can fall asleep at any time; for instance, at work or while they are driving. They may also have other sleep-related problems, including a lack of energy and trouble thinking clearly.

According to the National Sleep Foundation, up to 40% of people have some symptoms of hypersomnia from time to time.

What Causes Hypersomnia?

There are several potential causes of hypersomnia, including:

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