Some primary hypersomnias, such as idiopathic hypersomnia, still possess many unknown characteristics and factors. Idiopathic hypersomnia is a rare condition that is extremely difficult to diagnose during its early stages. Typically, the condition is chronic, affecting a person for their entire life. Due to the lack of knowledge and research, idiopathic hypersomnia has many other names in medical literature, such as primary hypersomnia, central hypersomnia, IH, IHS, and just hypersomnia. Individuals with idiopathic hypersomnia experience extended sleep at night and have difficulty waking up.
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