The differences between those with masseter muscles and those without masseter muscles are: different face shapes, different closed-mouth clenching, and different formations.

1. Different face shapes

1. Masseter muscle: Most faces with masseter muscle are nearly square.

2. No masseter muscle: Face shapes without masseter muscle are mostly oval oval face and oval face.

—Generally, people with enlarged masseter muscles have a nearly square face shape. The beauty seeker can touch the bilateral masseter muscles at the angle of the mandible while closing the mouth and clenching the teeth to feel the contraction range and thickness of the masseter muscles. In patients with masseter hypertrophy, the masseter muscle can be obviously enlarged and thickened when the masseter muscle contracts. While examining the masseter muscles, you also need to pay attention to the degree of hypertrophy of the mandibular angle and whether there is any valgus phenomenon in the mandibular angle.

2. Differences in clenching teeth with the mouth closed

1. Masseter muscle: Those with masseter muscle can obviously feel the enlargement of the mandibular angle muscles and the thickening of the muscles when the mouth is closed and the teeth are closed.

2. No masseter muscle: When the patient without masseter muscle closes the mouth and bites the teeth, the mandibular angle muscle range does not expand significantly.

3. Differences in formation

1. Masseter muscle: Due to frequent chewing of hard food, it is easy to cause masseter muscle on the face.

2. No masseter muscles: Ordinary people are generally born without masseter muscles. If they do not chew hard food regularly, it is not easy to form masseter muscles.