Why do single eyelids turn into double eyelids when you are tired?

Because when people do not get a good rest, the water content of the skin will decrease (see the haggard skin and face that looks thin after staying up all night), and the degree of eyelid edema will naturally decrease (a counterexample is that after sleeping full in the morning, the eyelids will usually be swollen) ), the originally swollen single eyelids will naturally become a thin layer of eyelids, and wrinkles will easily appear, that is, double eyelids. My double eyelids turn into double eyelids at night, sometimes when my mood is very high or when I am very busy... It turns out that I read a post and it seems that this happens when the brain is under heavy load. It seems that before Leslie Cheung died, his double eyelids had become triple eyelids because of the heavy burden on his brain caused by depression... Actually, my eyes are quite big, and my mother has standard Zhao Wei eyes, which are big and double, but My father has single eyelids. . . . . . On the importance of genes! ! ! Maybe I inherited the genetic potential for double eyelids. As long as I rolled my eyes since I was a child, my eyes would become double eyelids (is there such a magical skill!!!). Then every time I take a ID photo, I will open my double eyelids in advance. ! This creates the illusion that I have had double eyelids since I was a child when looking at my ID photo, hahahaha! Of course, it may not last more than five minutes because the level is not high enough. but! As I stared more and more, during the summer vacation of my junior year, I slept on a plane and woke up with double eyelids! ! ! In fact, I thought at the time that I just slept too much and would go back to the wretched single-eyelid look after a while. But! ! ! ! It has never changed since then! ! ! Is there any point in saving money and suffering for double eyelid surgery? ! ! Everyone is in high spirits! ! ! ! People around me asked me if I had a cut, so I explained it to myself and it felt so good, hahaha~~~~ I won’t say more, I hope everyone can become a handsome guy/beautiful girl with electric eyes.