If the face is hit by external force, severe trauma may lead to necrosis or scar formation of subcutaneous adipose tissue of facial skin. When the facial bone fracture can't be treated by reduction, the wound will lead to facial asymmetry after healing.

2. Facial asymmetry caused by behavioral habits

Facial asymmetry is closely related to daily living habits. If you chew food with only one tooth, the masseter muscles on this side of your face will be more developed, resulting in facial asymmetry. Life is far more than this example, just like breathing, mouth shape, and even bad standing and sleeping posture will affect your face shape.

Extended data:

Beauty research: people's facial features become asymmetrical with age.

It is reported that the research mainly adopts three-dimensional digital imaging technology and root mean square deviation calculation. The researchers selected 19 1 volunteers aged from 4 months to 88 years and scanned their faces in detail. This digital imaging method can distinguish very subtle asymmetry. Then, they calculate the root mean square deviation (RMSD) to quantify this asymmetry.

Finally, it is concluded that the increase of age is positively related to the asymmetry of human facial structure. The facial structure deviates about 0.06 mm every ten years, and this deviation mainly occurs in the middle and lower part of the face, that is, from the eyebrows to the chin.

This change is very subtle, but its function can not be ignored, because the facial differences between people are mainly concentrated in the middle and lower parts of the face. This research has been published in the Journal of Plastic Surgery and Facial Plastic Surgery, or it will have a significant impact on related cosmetic projects.

People's Network-Why are the left and right faces asymmetrical? How to correct facial asymmetry?

People's Daily Online-American Studies: People's facial features become asymmetrical with age.