Chances are, you have experienced that dragging, dull semi-conscious feeling you get from sleep deprivation (lack of sleep). All you want to do is take a nap. However, for individuals who are suffering with primary hypersomnia, they are dealing with this feeling every day. They feel only half-awake and hardly ever can get enough quality sleep at night to promise them a refreshed day the next morning. This constant state of being is known as Kleine-Levin Syndrome or sometimes referred to as Sleeping Beauty Syndrome.