This disease is mainly caused by external violence, so there is no special prevention method, avoiding injuries in production life is the key to prevent this disease. In addition, it should be noted that if a fracture of the zygomatic bone and zygomatic arch occurs, it should be seen promptly and treated according to the situation after the diagnosis is clear. 1.Zygomatic facial collapse The direction of fracture displacement after fracture of zygomatic bone and zygomatic arch depends mainly on the direction of external force, and more inward displacement occurs. In the early post-injury period, zygomatic-facial depression is seen. 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. 2.Mouth opening restriction Due to the internal displacement of the fracture block, the temporalis and occlusal muscles are compressed and the rostral prominence movement is obstructed, resulting in mouth opening pain and mouth opening restriction. 3, Diplopia The zygomatic bone constitutes most of the lateral wall and infraorbital rim of the orbit. After displacement of the zygomatic fracture, diplopia can be found due to displacement of the eye, oozing blood and local edema of the adductor muscle, and the torn inferior oblique muscle embedded in the fracture line, limiting eye movement. 4. Bruising When there is a closed fracture of the orbital wall of the zygoma, there may be hemorrhagic bruises under the periorbital skin, eyelids and conjunctiva. 5. Neurological symptoms A fracture of the maxillary process of the zygomatic bone may damage the infraorbital nerve, resulting in numbness in the innervated area of the nerve. If the zygomatic branch of the facial nerve is also damaged during the fracture, eyelid closure may be incomplete. Treatment 1.Non-surgical treatment After fracture of zygoma and zygomatic arch, if there is only mild displacement, deformity is not obvious, there is no restriction of mouth opening and dysfunction such as diplopia, surgical treatment is not possible. Anyone with mouth opening restriction should undergo repositioning surgery. Although there is no dysfunction but significant deformity can also be considered for surgical repositioning. 2.Surgical treatment The treatment of zygomatic bone and zygomatic arch fracture is mainly surgical repositioning. After the fracture of zygoma and zygomatic arch, all those who have functional disorder should be treated by repositioning. If there is no displacement or displacement is not obvious, and there is no functional disorder, special treatment may not be done. After the fracture of zygoma and zygomatic arch is reset, in order to prevent the fracture segment from being re-displaced, the mouth opening movement should be appropriately restricted, collision should be avoided, and the healthy side lying position should be used during sleep.