Side effects of lack of sleep are, confusion, loss of coordination, memory loss, depression and slow reaction times.
Lack of sleep can also cause you to get into car accidents that can be deadly and lack of sleep can also lead to other serious health problems such as heart disease, heart attack and strokes.
Aging of the skin also occurs from lack of sleep and you'll look much older than you are and you may even get bags under your eyes if you don't get enough sleep.
Our bodies require the proper amount of sleep to repair itself and recharge and without the proper sleep our bodies can't recharge or repair and we feel lousy.