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    Sleep Disorders Health Center

    Hypersomnia / Daytime Sleepiness Directory

    Hypersomnia/daytime sleepiness is episodes of excessive sleepiness during the day. Follow the links below to find WebMD's comprehensive coverage about how hypersomnia/daytime sleepiness occurs, how it's diagnosed, how to treat it, and much more.

    Medical Reference


    Thumbnail: What's Causing You to Be Sleepy?

    Are you sleepy all the time? Find out what could be causing your excessive sleepiness, from working shifts to an underlying sleep disorder.

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