A woman says she's a real life Sleeping Beauty thanks to disorder which sees her nap up to 22 hours a day.<br /><br />Joanna Cox, 38, once slept for four days without waking up due to idiopathic hypersomnia.<br /><br />She was diagnosed after years of excessive sleeping and struggling to stay awake during the day.<br /><br />The rare condition leaves sufferers with extreme daytime sleepiness – often resulting struggles to wake-up and feeling "unrested" and "mentally foggy".
