One of the most interesting aspects of sleep in relation to the human body is that it isn’t entirely understood why we evolved to need sleep in the first place. While the mechanisms of action behind sleep are still somewhat of a mystery, we do know that our bodies require it to function properly and we know what happens when we don’t get enough. We feel more alert, energetic, happier, and better able to perform daily activities when well rested. When sleep deprived we feel groggy, irritable, and physically and mentally exhausted. One of the most noticeable indicators of poor sleep is skin health. Bad sleeping habits can create new problems for our skin or cause old ones to resurface.