Poor sleep quality or insufficient sleep leads to negative changes in facial appearance.

“Have you ever had a poor night's sleep and compared the way that you look after a poor night's sleep versus after a great night's sleep? ... You will see that you look very different. Your eyes will be sagging. You get those bags under your eyes. The eyebrows generally drop. There's a kind of a change in the tone of the eyes. You'll notice that's very typical. And any creases or wrinkles that you have will become more apparent.”

“If you think about it, that's wild. You sleep two hours less, or three hours less than usual, or you get one poor night's sleep, and you look very, very different.”