Causes of death following head injury include the following;
- raised intra-cranial pressure/ brain swelling/ herniation
- hypoxic/ ischaemic injury (e.g. following airway obstruction post-injury, due to aspiration of gastric contents (or blood etc) or postural asphyxia as a result of being pinned upside down in a vehicle following a road traffic collision, for example
- diffuse brain injury (vascular or axonal)
- blood loss (e.g. following a scalp laceration)
- infection (meningitis or pneumonia)
- epilepsy/ dementia
traumatic brain injury (Wikipedia)
traumatic brain injury resource guide
head trauma (emedicine)

