What about single eyelid in Shuang Yi? They used to be both pairs.

..... what a coincidence, my friend. I used to have very big eyelids, but now I have a pair of single eyelids.

In fact, the reason is simple.

First, it may be because you don't get enough sleep, sleep badly or sleep too short.

Secondly, it may be because the sleeping posture is wrong and the eyes are swollen.

The third kind is just the opposite of the first kind, even if you sleep too much, your eyes will swell.

I tried. After I pinch my eyes with cold water, they will turn into double eyelids in a short time.

If it changes back after the hug, hold your eyes with ice cubes 10 minutes to half an hour, depending on your personal situation. Don't rub your eyes with your hands, and don't wipe your eyes with dirty towels.

Don't cry or sleep for a long time. These are all bad habits in daily life. Just pay more attention.