The right side of the cheek is larger than the left side of the cheek is common in the following cases: 1. The presence of dental caries or missing teeth on the left side of the teeth is not repaired in time, resulting in a lateral chewing habit, long-term use of the right side of the teeth for chewing, resulting in uneven wear of the teeth, the right side of the masticatory muscle is stimulated by chewing to become enlarged, forming an asymmetrical appearance of the jaw face. 2. The right parotid duct and branches become blocked after the glandular secretion of fluid 3. When the right temporomandibular joint is damaged, adhesions are produced, sometimes forming joint ankylosis, making the right side of the jaw face fuller than the left side.