The zygomatic bone and zygomatic arch are the more prominent parts of the face and are susceptible to fracture due to impact. The zygomatic bone is associated with the maxilla, the frontal bone, the pterygoid bone and the temporal bone, among which the connection with the maxilla is the largest, so zygomatic bone fracture is often accompanied by maxillary fracture. The temporal eminence of the zygomatic bone is connected with the zygomatic process of the temporal bone to form the zygomatic arch, which is narrower and more prone to fracture. Zygomatic arch fracture can be clearly diagnosed according to the history of injury, clinical features and X-ray examination. Palpation: the fracture localization may have pressure and pain, collapse and displacement, zygomaticofrontal suture, zygomaticomandibular suture bone connection as well as the infraorbital rim may have step formation. If palpation is made from the mouth along the vestibular sulcus to the upper back, the space between the zygomatic bone and the maxilla and the rostral process can be examined to see if it becomes smaller. These can help in the diagnosis of zygomatic fracture. Radiographs: The examination is often done in the nose-chin position and the zygomatic arch position. In the nasal-chin position, not only the fracture of the zygoma and zygomatic arch can be seen, but also the structures of the orbit, maxillary sinus and infraorbital foramen can be observed with or without abnormality. The zygomatic arch position can clearly show the zygomatic arch fracture and displacement. If there is only mild displacement of zygomatic bone and zygomatic arch after fracture, deformity is not obvious, and there is no limitation of mouth opening and diplopia and other dysfunctions, the fracture can not be treated surgically. Anyone with limited mouth opening should undergo reduction surgery. Surgical repositioning may also be considered in those without functional impairment but with significant deformity. The main treatment for zygomatic and zygomatic arch fractures is surgical reduction. Zygomatic and zygomatic arch fractures should be restored wherever there is functional impairment. If there is no displacement or the displacement is not obvious and there is no functional disorder, no special treatment can be done. After the zygomatic bone and zygomatic arch fracture is dislocated, in order to prevent the fracture segment from being re-dislocated, it is necessary to appropriately restrict the movement of opening the mouth and avoid collision, and the healthy side should be used to lie down when sleeping.