First, superstition. It is always said that people have three souls and seven spirits. At the beginning of ancient times, there was a certain superstition about such a "magical" thing as a mirror. It is always said that at some time in the middle of the night, people's three souls and seven souls are relatively scattered, and the so-called "yang spirit" is insufficient, so they can't hold their own souls.
In all kinds of ghost stories, midnight is always the best time for the soul to get out of the body, or the best time for the ghost to come out and suck the soul. When ancient people slept in front of the mirror, they always felt that sleeping in front of the mirror seemed to suck people's souls, which led to people's trance and abnormal behavior.
Second, share this problem scientifically. In other words, the mirror will reflect all kinds of light, and this reflected light will cause adverse reactions to the human body. For example, it can cause neurasthenia, poor sleep quality, insomnia and dreaminess.
There is also the problem of feng shui. In remote cities or rural areas, you should often see a small mirror hanging between the roofs of many houses.
According to many people's views on Feng Shui, that is to say, the mirror is a kind of "light evil spirit", that is, it can reflect unclean and bad things. However, this is also part of superstition. I think I personally hold the idea that I would rather believe it than believe it.
Since many people say that it is not good to sleep in front of the mirror, let's change the direction of the mirror.
On the other hand, it is said that ghosts or their past lives can be seen in the mirror at some environmental time points. There are not many ghost stories of this type. When I woke up, I saw a face that didn't belong to me in the mirror.