After a car accident creates the head, the specific results must be clarified according to the clinical symptoms. In general, if there is simply dizziness and headache and no other reaction, it is basically a diagnosis of traumatic brain injury reaction syndrome, which can basically heal itself at a later stage with adequate rest and adequate nutrition. If the patient is in a coma and has retrograde amnesia, it may be a manifestation of concussion, and a head CT is needed to confirm the diagnosis. If the coma is more serious than half an hour, it may be a case of cerebral contusion, often accompanied by other functional disorders, such as epilepsy, numbness and weakness of the limbs, speech dysfunction, often leaving a certain degree of disability, requiring regular medical rehabilitation, and even in some cases the cerebral contusion is so serious that it requires surgical treatment, and the prognosis at a later stage is not The prognosis is not particularly good. In more severe cases, respiratory and circulatory failure may even cause death, so it depends on the specific situation at the time.