User blog comment:Paul.rea/Teen Wolf News 020614/@comment-4002875-20140207165036

There is a medical condition that prevents full sleep for a long time. people would only get around an hour or 2 of sleep per night, no matter how hard they try or what pills they take. And when they do sleep, they dont reach REM sleep, which is when our brains "Recharge". its not called insomnia, but it is related to it. Insomnia is just that its hard to fall asleep, not difficulty reaching REM. Insomniacs reach REM when they fall asleep, but people with the medical condition (i cant find the name of it) eventually die from it after about 6 to 8 months.


 * EDIT**

Thanks to my friend Wikipedia i found it. Its called Fatal Familial Insomnia. Also, if you look it up, it desccribes ALL of the symptoms that stiles is having.