4.9.1 Probable hypnic headache

Diagnostic criteria:
  1. Recurrent headache attacks fulfilling criteria B and C
  2. Developing only during sleep, and causing wakening
  3. Two only of the following:
  4. occurring on ≥10 days/month for >3 months
  5. lasting from 15 minutes up to 4 hours after waking
  6. no cranial autonomic symptoms or restlessness
  7. Not fulfilling ICHD-3 criteria for any other headache disorder
  8. Not better accounted for by another ICHD-3 diagnosis.