Headache developing within 24 hours after regular consumption of caffeine in excess of 200 mg/day for more than 2 weeks, which has been interrupted. It resolves spontaneously within 7 days in the absence of further consumption.

Diagnostic criteria:
  1. Headache fulfilling criterion C
  2. Caffeine consumption of >200 mg/day for >2 weeks, which has been interrupted or delayed
  3. Evidence of causation demonstrated by both of the following:
    1. headache has developed within 24 hours after last caffeine intake
    2. either or both of the following:
      • a) headache is relieved within 1 hour by intake of caffeine 100 mg
      • b) headache has resolved within 7 days after total caffeine withdrawal
  4. Not better accounted for by another ICHD-3 diagnosis.