10 Causes of Hypersomnia
Cause #3: Kleine-Levin Syndrome
Kleine-Levin syndrome (KLS) is also known as Sleeping Beauty Syndrome. It is a rare sleep disorder where there is persistent hypersomnia, mood changes, and cognitive changes. Patients also experience hypersexuality and hyperphagia. These episodes are often recurrent for many years and return at a later age. It can greatly affect personal, social, and professional lives of patients.
Since it is very rare, it is only seen in 1 out of 1 million individuals, limiting the amount of research that can be performed on the disease. Patients with Kleine-Levin syndrome often experience hypersomnia where they sleep from 15 to 21 hours a day.
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