Because we all know that a large part of the body's weight comes from bones and water, and muscles are only attached to bones, such as chest muscles and lower limb muscles.
Of course, our facial expression muscles are an exception. This is directly attached to the facial skin. When we produce different expressions, facial expression muscles will contract, and then affect the skin on our faces, so all of us, men, women and children, will have various expressions. People with facial muscle defects will show her dimples when they smile. This special muscle that appears on our faces is the smiling muscle, which I understand probably.
There is also a legend that the source of dimples is that passionate people are unwilling to forget their past lives, so they refused Meng Po's water for forgetting the year (Meng Po Tang), so Meng Po marked their faces, and finally let them go through hardships one by one and be reborn as human beings to complete their unfinished love.
Although I am also a person with dimples, I can't remember my previous life, and I don't even know the people I loved in my previous life, or even the people I really like. I think this is really a beautiful legend.
But when I was about ten years old, I found that among our brothers and sisters, as long as my sister and I had dimples, others didn't. Every time I look at my sister eating and laughing, my dimples are looming and I feel like it. I asked my mother why some people have dimples on their faces and some people don't. My mother told me another story. She said that it must be that Nu Wa was too tired when kneading clay figurines to create the world. She didn't grasp the strength to stop and poked the hole with her finger, so you have dimples. Look at your small eyes, dimples and a big nose, but your nose is not straight. Obviously, Nuwa was too tired and careless when she squeezed you. I have seen the Lotus Lantern and the legend of Nezha before, and I think it must be true.
Later, I learned that I was born, not squeezed. My mother must be dissatisfied with my appearance. I am not to blame for my fate. Therefore, I prefer the previous stories and legends. How can dimples appear because of the carelessness of Nu Wa?
There are also many people who have plastic surgery and dimples. In fact, it is the artificial adhesion between dermis and smiling muscle. The principle is relatively simple. In addition, because it is made inside the mouth, there will be no scars. Causes of dimple formation: heredity and acquired surgery.