Sleeping daughter syndrome in the medical world is known as Kleine-Levin Syndrome (KLS). This condition is a rare neurological disorder, which makes sufferers experience excessive sleep. Find out more about the causes, symptoms, and ways of treating this syndrome. Sleeping Beauty Syndrome has typical symptoms related to the sleep pattern of the sufferer, ie the sufferer can sleep for a long period of time (hypersomnia). During the sleep period, the patient can sleep for more than 20 hours per day. These symptoms of prolonged sleep can occur for several days or even months. However, when the long sleep period ends, people with this sleeping beauty syndrome can return to their normal activities like normal people, until then the long sleep period is repeated again. Sleeping beauty syndrome or sleeping beauty usually attacks adolescents, and about 70 percent of sufferers are men. Even so, this disorder can affect anyone of all ages. Causes of Sleeping Beauty Syndrome The exact cause