The so-called "hair cheeks", the most basic performance is that the face becomes bigger and wider, and the reasons for the big face are nothing more than two types: facial bones and soft tissues, mainly including masseter muscles and fat.

First of all, let's analyze the bones: some people think that the main reason for gills is the secondary development of the mandible. But generally speaking, the development of human facial bones is basically stable after adulthood, and even if it develops again, the growth is very limited. Some articles show that-"the length of mandibular body still increases obviously from late adolescence to adulthood, and its growth period can last until the age of 25 or even 40." From late adolescence to adulthood, the comprehensive length of male mandible can be increased by 3-6mm, while the growth of female mandible is1mm.

Many people only see that the mandibular growth period of a small number of people will be extended to 25-40 years old, but they ignore the key point: the growth of female mandible is less than 1mm in the whole adult stage. Therefore, the probability that the secondary development of mandible leads to "gilling" can be basically ignored. Remove the bone, and the rest is soft tissue.

Simple understanding is caused by the development of masseter muscle. The habit of chewing at ordinary times, eating hard things and constantly exerting force on the masseter muscle will promote muscle growth and overgrowth of the masseter muscle. The characteristics are that the muscles on both sides of the cheek are hard, tight and outward, and look bulging.

Generally speaking, fat hair gills are simply understood as gaining weight, especially when some people gain weight on their faces, which will have the effect of hair gills. In this case, they try to lose weight. When their faces lose weight, their cheeks naturally disappear.