Science has now found that certain facial changes such as red eyes, puffy face and bags under the eyes mean that the person hasn’t slept well.

The study was conducted by researchers at the Stockholm University in Stockholm, Sweden, and was based on viewers’ assessment of 20 photographs. Study results showed that faces of sleep-deprived people looked sadder than others. These people also had paler skin, swollen eyes, droopy corners around the mouth and even wrinkles.

https://www.natureworldnews.com/articles/3768/20130831/facial-expressions-reveal-sleep-quality.htm