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There are health conditions that cause a person to sleep far too much. If you frequently sleep too much, you may have a sleep disorder known as hypersomnia. There are several reasons why people sleep too much. Sleep apnea â this is a sleep disorder that causes people to stop breathing during sleep. The normal sleep pattern can be disturbed as many as hundreds of times a night. This amount of inadequate sleep leads to an increased sleepiness during the day as they are not getting enough quality sleep at night.
A person with narcolepsy usually has the condition for life. All people with narcolepsy have extreme levels of sleepiness during the day, but how this shows itself can differ. For instance, some people with narcolepsy might fall asleep for 10 to 20 minutes several times every day, whether they want to or not.