2.Skin doesn't heal as well from damage when you are tired, leading to skin aging.
3.Tired people have a harder time controlling their impulses, potentially leading to unhealthy behavior and weight gain.
4.People feel lonelier after sleepless nights — and being lonely makes it harder to sleep well.
5.Being sleepy makes it harder to learn and disrupts short-term memory
6.Long-term sleep deprivation also seems to damage long-term memory
7.A growing body of evidence links bad sleep with signs of Alzheimer's in the brain.
8.Heart disease risk rises with sleep deprivation.
9.Sleep-deprived people have slower reactions.
10.The immune system doesn't work as well when you're tired.