Fractures of the zygomatic bone cause collapse of the zygomatic face. The zygomatic bone and zygomatic arch are the more prominent parts of the face and are susceptible to fracture by impact. The zygomatic bone is associated with the maxilla, frontal bone, pterygoid bone and temporal bone, with the largest connection surface with the maxilla, so fractureofmalarbone is often accompanied by fracture of the maxilla. The temporal eminence of the zygomatic bone is connected to the zygomatic eminence of the temporal bone to form the zygomatic arch, which is thinner and narrower and more prone to fractureofzygomaticarch. The disease is mainly caused by the action of external violence. Since the zygomatic bone and zygomatic arch are the more prominent part of the face, they are easily fractured by violence such as collision trauma. The direction of fracture displacement after fracture of zygoma and zygomatic arch mainly depends on the direction of external force, and most of the fractures occur inward displacement. In the early post-injury period, zygomatic-facial depression is visible; subsequently, due to local swelling, the depression deformity is not obvious and is easily mistaken for a simple soft tissue injury. When the swelling subsides after a few days, local collapse occurs again.