Sleep disturbance Excessive sleep 2025-10-20T16:47:01Z A clinical phenomenon characterized by sleeping longer than what is typical or necessary for a person's age and context, or by recurrent episodes of sleep that intrude upon the waking hours. Excessive sleep is identified through self-reports or observations and may involve prolonged nighttime sleep, frequent daytime naps, or episodes of unintentional sleep. Excessive sleep often occurs even when a person has had adequate nighttime sleep and may be associated with functional impairment, reduced alertness, or dissatisfaction with sleep. Prolonged sleep duration Sleeping too much