A face that is too broad, too square or too rectangular is often due to a hypertrophy of the masseter muscle that is common among Asians.
A study published in the Journal of Plastic and Reconstructive Surgery classifies hypertrophy of the masseter; in the study, five types of projection (minimal, mono, double, triple and excessive) and three degrees of thickness (<10 mm, 10 -14 mm,> 14 mm) are defined.
The lower face can be wide because of three factors:
- The bone structure.
- The presence of fat at this level.
- A bulky/ large masseter muscle.