Chin flexion means that the front end of the chin is concave and curved. This chin shape is usually considered as an unattractive feature, because it makes people's facial contours look strange. However, sometimes, this chin shape can also be used by people to pursue a unique aesthetic feeling. Therefore, the chin is not completely bad. As long as it is properly matched, it still has a certain aesthetic feeling.

The shape of the chin is usually innate, which means it is a genetic factor. If several people in a family have similar chins, then children are likely to have the same chin shape. In addition, it is influenced by external factors, such as age, diet and chewing style. It may also lead to changes in the shape of the chin and become a fighting chin.

If a person doesn't like the fighting chin on his face, there are many ways to try to improve it. For example, you can change the shape of the chin through plastic surgery, which is usually the fastest and most direct method. However, the risk of surgery is high, so it is necessary to make full preparations in advance and choose regular hospitals and professional doctors. In addition, muscle training and massage can also be used to improve the shape of the chin. This method is relatively safe, but change takes a long time and requires patience and perseverance.