16 year old girl developmental incongruity, the face is also on one side of the big side of the small usually see maxillofacial surgery, stomatology, plastic surgery. Jawbone is one of the important bones of human face, divided into maxilla and mandible, jawbone is divided into left and right, and connected in the midline of the face, if in the process of development, the right side has the left side of the jawbone development is delayed, there will be asymmetry of the face, which makes the face on one side is big and on the other side is small, it is recommended that the patient to go to the Maxillofacial Surgery Department for consultation. In life, if one side of the teeth is often used to bite things, it may lead to asymmetrical jaw deformity. Secondly, if the jaw and face are traumatized at an early age, it may affect the normal development of the jaw, resulting in faster development of the jaw on one side, thus resulting in a large and small face, which can be treated at the stomatology department. In addition, there are also asymmetry of the face caused by soft tissues, such as asymmetry of the development of subcutaneous fat, biting muscle, parotid gland, etc., which can be treated by liposuction, lipofilling, and Botulinum toxin injection of the biting muscle in the Department of Plastic Surgery. For patients whose faces are large on one side and small on the other, it is recommended to go to the maxillofacial surgery, stomatology, and plastic surgery departments of regular hospitals.