Fractures of the anterior, middle, and posterior cranial fossae are present, usually as a result of major violence to the head, and the clinical picture is characterized by very marked petechial hemorrhage or ecchymosis of the orbits. In addition, cerebrospinal fluid may be seen oozing from the nose, mouth or external ear canal, and the cerebrospinal fluid is usually mixed with blood, which usually appears as light red or clear dark red blood, and fractures of the anterior, middle and posterior cranial fossae may be combined with pneumocranial or intracranial tissue damage, which may lead to intracranial hemorrhage, etc. Cranial brain CT and skull base CT are necessary to make the diagnosis completely clear. If the fracture is purely in the anterior, middle and posterior cranial fossa, the fracture can usually heal gradually with the treatment of hemostasis and pain relief, combined with the prevention of infection.