Nicole Delien, 17, from Pennsylvania, has missed many important occasions and family holidays in her life due to a rare sleep disorder, called as 'Sleeping Beauty Syndrome'.
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According to her mother, Nicole sleeps continuously for 17 to 18 hours in a day and when she dose get up to eat, she appears to be in a sleep walking state.
The syndrome termed as Kleine Levin Syndrome, causes excessive sleeping, and victims can experience hallucinations, disorientation and binge eating behavior when awake.
The cause of Kleine-Levin Syndrome remains unknown.
Source-Medindia