This statement is quite superstitious. It is said that if you look in the mirror at night, you will see some "bad things" and there may be supernatural events.
Old people believe that everyone has both human and ghost energy. At night, Yang Qi decreases and Yin Qi rises. If you look in the mirror at this time, you will see those dirty things.
Of course, everyone now knows that this statement is nonsense, but many elderly people still retain this idea. Therefore, if the elderly see young people looking in the mirror at night, they will be very nervous and say they will have nightmares at night.
But in fact, young people now sleep late, and many of them don't wash up until after 12 o'clock. There are also many people who do skin care at 1 or 2 o'clock in the morning, and everyone is safe.
This statement comes from a legend. There was a family with two brothers, both of whom married wives. The eldest daughter-in-law heard that the younger daughter-in-law was very beautiful, so one night she secretly went to his house to take a peek.
It turned out that the little daughter-in-law took off her hair and used it in her hands to comb her hair. So, since then, everyone said that combing your hair in front of the mirror is a girl.
In addition to this statement, some elderly people have another statement. When it comes to looking in the mirror at night, that is something only promiscuous women do. Women usually dress up in the morning.
Relatively few people know this statement now, and from the current perspective, this statement is not valid. Nowadays, many jobs also require shifts at night, such as customer service and supermarket staff, but not necessarily all of them.
So, don’t believe these legends. As long as you are not afraid, you can look in the mirror whenever you want. But if some people are very timid, remember to turn on the light when looking in the mirror at night, otherwise you may be scared by yourself.