The severity of a head fracture is determined by the extent of the fracture, the depth of depression of the bone, and whether the fracture causes intracranial hemorrhage. If the fracture is a simple linear fracture of the skull and does not cause intracranial hemorrhage, it is a mild craniocerebral injury and a minor injury. If the fracture is bleeding, causing acute epidural hematoma, the large amount of hematoma will cause coma or even brain herniation, requiring emergency craniotomy, the injury is at least moderate to severe craniocerebral injury. If the fracture is a depressed or comminuted fracture that causes open cranial injury, emergency debridement of the fragmented bone and open cranial injury debridement is also required. Postoperatively, there is a risk of hemiparesis and seizures, which are considered moderate to severe craniosynostosis.