What Is Hypersomnia? Hypersomnia is a sleep disorder characterized by excessive daytime sleepiness (EDS), prolonged nighttime sleep (often 10+ hours), and difficulty waking up. Unlike fatigue, people with hypersomnia feel an irresistible need to sleep even after adequate rest, which interferes with daily life. Types of Hypersomnia Symptoms of Hypersomnia Severe Cases: Some people experience automatic behaviors (performing tasks without memory of doing … Continue reading Hypersomnia: What It Is, Causes, Symptoms & Treatment