Idiopathic hypersomnia is sleeping too much (
hypersomnia) without an obvious cause. It is different from narcolepsy, because idiopathic hypersomnia does not involve suddenly falling asleep or losing muscle control due to strong emotions (cataplexy).
Hypersomnia - idiopathic; Drowsiness - idiopathic; Somnolence - idiopathic
Causes, incidence, and risk factors
The usual approach is to consider other potential causes of excessive daytime sleepiness.
Other sleep disorders that may cause daytime sleepiness include:
Isolated sleep paralysis Narcolepsy Obstructive sleep apnea Restless leg syndrome
Other causes of excessive sleepiness include:
- Certain medications
- Drug and alcohol use
- Low thyroid function (