Headache occurring during, and caused by, an acute rise in blood pressure induced by an exogenous pressor agent.
A. Any headache fulfilling criterion C
B. An acute rise in blood pressure has followed administration of an exogenous pressor agent
C. Evidence of causation demonstrated by both of the following:
1. headache has occurred within 1 hr of administration of the pressor agent
2. headache has resolved within 72 hr after administration of the pressor agent has ceased
D. Not better accounted for by another ICHD-3 diagnosis.