When Beth Goodier of Stockport was 16, she went for a sleep, but did not wake up for another six months.
Over the ensuing years, Ms Goodier slept for an average of 22 hours a day, waking up occasionally but remaining in a trance-like state.
Her mother had initially feared the worse and jumped to the conclusion that her daughter was inflicted with a brain tumour or haemorrhage and rushed the then teenager to hospital.
However, doctors cleared her of the two deadly ailments and were somewhat baffled by the case.
That was until one doctor remembered a similar case that they had once dealt with.
Eventually, Ms Goodier, who is now 22, was diagnosed with Kleine-Levin syndrome (KLS) – a rare sleep disorder that can cause hypersomnia.
The condition, also known as ‘Sleeping Beauty syndrome’ and occurs at a rate of one in a million, was believed to have been triggered in the youngster by tonsillitis.
Ms Goodier’s mother, Janine, who gave up her job to care for Beth full-time, said that it “breaks her heart”.
The 48-year old added: “She might wake up tomorrow and then it’s a race against time to live the life she should have had. She rushes off to catch up with her friends and get her hair done. But no one knows when she might fall asleep again.
“It breaks my heart to see the best years of her life slipping away.”
While many teenagers would dream of the chance to sleep throughout the day, it is a nightmare for the sufferers.
Ms Goodier has slept for an average of 75 per cent of the day, every day, since the condition first hit her five years ago.
The scarce hours that the young woman is awake for, she has to make sure that she eats enough to sustain herself.
Additionally, she has to use the precious hours that she is awake for to make time for her boyfriend – who she claims has been extremely supportive since they met three years ago.
KLS still remains a medical mystery with healthcare professionals unsure what causes it and still struggling to find a cure.