2.4.1 Probable infrequent episodic tension-type headache

Diagnostic criteria:
  1. One or more episodes of headache fulfilling all but one of criteria A-D for 2.1 Infrequent episodic tension-type headache
  2. Not fulfilling ICHD-3 criteria for any other headache disorder
  3. Not better accounted for by another ICHD-3 diagnosis.