A British teen suffering from a rare neurological disorder that induces long periods of sleep recently awoke after sleeping for two months.

"I've missed nine exams and my birthday in November," 15-year-old Stacey Comerford tells the Sun. "It's easier now people know what it is. It's easier to explain to them. Before, people didn't believe me. That was the hardest thing."

Comerford suffers from Kleine Levin Syndrome (KLS), also known as Sleeping Beauty Syndrome, a condition affecting only about 1,000 people around the world.

The National Institute of Neurological Disorders and Stroke (NINDS) says Kleine Levin Syndrome affects primarily adolescent males (70 percent) and can often result in an individual sleeping for up to 20 hours at a time. While there is no treatment or cure for the condition, many individuals living with the condition simply outgrow it as they age, usually over the course of 8 to 12 years.

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