What is it?

Idiopathic Hypersomnia is a common sleep disorder, causing the person to be sleepy during the day, even after getting a good sleep. These people are also hard to wake up, take naps that are not refreshing and could fall asleep at any moment, including while driving a car.

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Signs & symptoms

Symptoms may include sleeping more than 11 hours during the day, having a hard time waking up, struggling doing normal daily activities, not feeling rested after sleep or naps and having brain fog.


Diagnosis is made by ruling out other common sleep disorders like obstructive sleep apnea. The patient is asked to fill an epworth sleepiness scale and a sleep diary. Then, a polysomnogram may be conducted in a sleep center and on the next day multiple sleep latency tests can measure sleepiness during daytime.


Idiopathic hypersomnia has no known cause, which makes it hard for treating. A regular nighttime sleep schedule is usually advised and stimulant medication could help during the day.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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