Facial asymmetry is often caused by deformities of the mandible or maxilla. Mandibular deformities are often pronounced, and various surgical procedures have been developed to treat such conditions. Deformities of the maxilla are similarly deviated from the normal.
Asymmetrical facial features are normal and common. They are often the result of genetics, aging, or lifestyle factors. Most people do not notice facial asymmetry in others, and research shows that it may even be a desirable feature.