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The Cleveland Clinic

Sleep Disorders: Hypersomnia

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.




Next: What causes hypersomnia? »

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Hypersomnia

Premenstrual Dysphoric Disorder (PMDD) »

What is premenstrual dysphoric disorder (PMDD)?

Premenstrual dysphoric disorder (PMDD) can be considered to be a severe form of premenstrual syndrome (PMS). Both PMS and PMDD are characterized by unpleasant physical and psychological symptoms that occur in the second half of a woman's menstrual cycle, most commonly in the days preceding the menstrual period. Fatigue, mood changes, irritability, and abdominal bloating are among the most common symptoms of PMS and PMDD, but numerous other symptoms have been reported. Whereas the symptoms of PMS may be troubling and unpleasant, PMDD may cause severe, debilitating symptoms that interfere with a woman's ability to function.

PMS is much more common than PMDD. PMS may affect to 30% of women with regular menstrual cycles, while only 3% to 8% of these women have true PMDD.

PMDD has been previously medically referred to as late luteal phase dysphoric disord...

Read the Premenstrual Dysphoric Disorder (PMDD) article »




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