The mechanism of injury is often your first clue that a casualty may have sustained a head injury. A head injury can be caused by:

- Involvement in a vehicle blast event, collision, or rollover
- Presence within 50 METERS of any blast (inside or outside)
- A direct blow to the head or a fall
- Exposure to more than one blast event
- Gunshot or shrapnel wound to the head, open skull fracture, etc.