The main reason may be a series of maxillofacial cascade reactions caused by changes in occlusal force, but further experiments are needed to prove this; plus, if the food eaten is mainly soft or liquid or semi-liquid food, it may lead to masticatory muscle atrophy, and such a diet is often accompanied by malnutrition, thus causing facial fat loss and resulting in protruding cheekbones, temples and cheeks sunken, as well as increased lines. “This diet is often accompanied by malnutrition, which may lead to protruding cheekbones, sunken temples and cheeks, and increased lines. In addition, due to the long time required for orthodontic treatment, the age-related changes in the soft tissues of the face are also possible causes of “braces face”.