Diagnostic criteria:
  1. Any headache fulfilling criteria C and D
  2. Trauma or injury to the head and/or neck of a type not described above has occurred
  3. Evidence of causation demonstrated by either or both of the following:
    1. headache has developed in close temporal relation to the trauma or injury
    2. other evidence exists of causation by the trauma or injury
  4. Headache persists for >3 months after its onset
  5. Not better accounted for by another ICHD-3 diagnosis.