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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.
Sleep Apnea and Excessive Sleepiness Sleep apnea is becoming a more common cause of sleepiness in children and adults. Sleep apnea occurs when the upper airway collapses for at least 10 seconds during sleep -- and does so up to hundreds of times each night.