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A5.1.2.1 Delayed-onset acute headache attributed to mild traumatic injury to the head

Diagnostic criteria:
  1. Any headache fulfilling criteria C and D
  2. Traumatic injury to the head has occurred, fulfilling both of the following:
    1. associated with none of the following:
      • loss of consciousness for >30 minutes
      • Glasgow Coma Scale (GCS) <13
      • post-traumatic amnesia lasting >24 hours
      • altered level of awareness for >24 hours
      • imaging evidence of a traumatic head injury such as skull fracture, intracranial haemorrhage and/or brain contusion
    2. associated, immediately following the head injury, with one or more of the following symptoms and/or signs:
      • transient confusion, disorientation or impaired consciousness
      • loss of memory for events immediately before or after the injury
      • two or more other symptoms suggestive of mild traumatic brain injury:
        • – nausea
        • – vomiting
        • – visual disturbances
        • – dizziness and/or vertigo
        • – gait and/or postural imbalance
        • – impaired memory and/or concentration
  3. Headache is reported to have developed between 7 days and 3 months after all of the following:
    1. the head injury
    2. regaining of consciousness following the head injury (when applicable)
    3. discontinuation of medication(s) impairing ability to sense or report headache following the head injury (when applicable)
  4. Either of the following:
    1. headache has resolved within 3 months after its onset
    2. headache has not yet resolved but 3 months have not yet passed since its onset
  5. Not better accounted for by another ICHD-3 diagnosis.