Nearly everybody has experienced those days where you didn't get hardly any sleep the night before (or maybe even a few nights in a row). You're groggy all day, have trouble focusing, your mind drifts as you try to perform mundane tasks, and you may even feel a little more irritable than normal. However, with just one night of good rest, you're back to your normal, focused, alert self in no time.
Now try and imagine what it must be like to live in a state of perpetual drowsiness, chronically plagued with sleepiness. To make matters worse, imagine that you actually sleep just as much, if not more, than the necessary amount, and take frequent naps on top of that. Imagine living a life where you sleep as much as you can, but never get that rested, recharged feeling that sleep is supposed to give you. This is what it's like for those suffering from the rare disorder known as idiopathic hypersomnia.