Being an adult can be hard (I say this like I'm 35, not 20).
But seriously, whether you're stressing about Uni or college work, are up binge watching That Show On Netflix, are so busy with a full time job or are rushing around with a baby, there's a number of things that can take their toll.
One of which being getting little to no sleep.
You know the drill, you stay up all night, worry about not getting enough sleep ready for the next day but because you're WORRYING so much you end up... not getting enough sleep.