Sleeping Beauty Syndrome

Sleeping beauty syndrome or Kleine-Levin syndrome is a rare sleep disorder that causes the patients to experience periods of excessive sleep episodes, which can last anywhere from 20 hours a day to a couple of days to even weeks. About 80 percent of patients are teenagers when they first experience KLS. These episodes of lengthy sleep may be proceeded by flu-like symptoms and, when they're awake, people with this syndrome may exhibit various odd behaviors, including eating excessively, hallucinating or acting childishly.