A. Any headache fulfilling criterion C
B. Specific phobia has been diagnosed according to DSM-5 criteria
C. Headache occurs exclusively when the patient is exposed or anticipating exposure to the phobic stimulus
D. Not better accounted for by another ICHD-3 diagnosis.
Specific phobias typically last six or more months, causing clinically significant distress and/or impairment in social, occupational and/or other important areas of functioning.