A1.3 Chronic migraine (alternative criteria)

Alternative diagnostic criteria:
  1. Headache (migraine-like or tension-type-like) on ≥15 days/month for >3 months and fulfilling criteria B and C
  2. Occurring in a patient who has had at least five attacks fulfilling criteria B-D for 1.1 Migraine without aura and/or criteria B and C for 1.2 Migraine with aura
  3. On ≥8 days/month for >3 months fulfilling any of the following:
    1. criteria C and D for 1.1 Migraine without aura
    2. criteria B and C for 1.2 Migraine with aura
    3. criteria A and B for 1.5 Probable migraine
  4. Not better accounted for by another ICHD-3 diagnosis.