Headache developing within 24 hours after daily consumption of opioid(s) for more than 3 months, which has been interrupted. It resolves spontaneously within 7 days in the absence of further consumption.

Diagnostic criteria:
  1. Headache fulfilling criterion C
  2. Opioid intake daily for >3 months, which has been interrupted
  3. Evidence of causation demonstrated by both of the following:
    1. headache has developed within 24 hours after last opioid intake
    2. headache has resolved within 7 days after total opioid withdrawal
  4. Not better accounted for by another ICHD-3 diagnosis.