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).Alternative Names
Hypersomnia - idiopathic; Drowsiness - idiopathic; Somnolence - idiopathicCauses, incidence, and risk factors
The usual approach is to consider other potential causes of excessive daytime sleepiness.
Other sleep disorders...