A. Headache fulfilling criteria for 5.2 Persistent headache attributed to traumatic injury to the head
B. Injury to the head associated with at least one of the following:
1. loss of consciousness for >30 min
2. Glasgow Coma Scale (GCS) score <13
3. post-traumatic amnesia1 lasting >24 hr
4. alteration in level of awareness for >24 hr
5. imaging evidence of a traumatic head injury such as intracranial haemorrhage and/or brain contusion.
1. The duration of post-traumatic amnesia is defined as the time between head injury and recovery of memory of current events and of those occurring in the last 24 hours.
When headache following head injury becomes persistent, the possibility of 8.2 Medication-overuse headache needs to be considered.