What too little sleep does to your brain and body

From tummy troubles to irritability and mood swings, eight horrible things than can happen if you don't sleep enough

Nearly 40% of us get less than seven hours of sleep a night (Getty Images)

Surrounding ourselves with screens comes with an unexpected side effect: We can't sleep.

And our bodies and minds are suffering.

Whether it's because we're staying up to squeeze in a final episode of "Master of None" or scrolling through Facebook, nearly 40% of us get less than seven hours of sleep a night, according to a recent Gallup poll. And the CDC estimates that another 50-70 million Americans likely have a sleep disorder.

Here are eight horrible things that can happen if you don't get enough sleep:

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