A. Headache fulfilling criteria for 5.2 Persistent headache attributed to traumatic injury to the head
B. Head injury fulfilling both of the following:
1. associated with none of the following:
a) loss of consciousness for >30 min
b) Glasgow Coma Scale (GCS) score <13
c) post-traumatic amnesia lasting >24 hr
d) altered level of awareness for >24 hr
e) imaging evidence of a traumatic head injury such as intracranial haemorrhage and/or brain contusion
2.associated, immediately following the head injury, with one or more of the following symptoms and/or signs:
a) transient confusion, disorientation or impaired consciousness
b) loss of memory for events immediately before or after the head injury
c) two or more other symptoms suggestive of mild traumatic brain injury: nausea, vomiting, visual disturbances, dizziness and/or vertigo, impaired memory and/or concentration.
When headache following head injury becomes persistent, the possibility of 8.2 Medication-overuse headache needs to be considered.