In fact, there are four types of facial hair gills: drooping hair gills and fat accumulation hair gills. The masseter muscle is developed and the bone is widened. Today we mainly talk about how to judge the bone hairy cheeks.
The bony cheekbones are the real cause of the square face caused by the lateral growth of mandible. However, in theory, human bones basically stop after adulthood, but this is not the case. Some people's mandibular growth period can last until about 40 years old, so this means that your mandible is also growing with age, which will lead to a square face.
It's easy to tell whether it's skinny or not. Touch the mandibular angle with your hand. If it is a hard bone, it is the bone that widens the hairline.
The other three types of hairiness have proper solutions, but there is only one way to treat bony hairiness, that is, mandibular angle osteotomy. Although there are risks, there is no other way.