Headache occurring during a partial epileptic seizure, ipsilateral to the epileptic discharge, and remitting immediately or soon after the seizure has terminated.
A. Any headache fulfilling criterion C
B. The patient is having a partial epileptic seizure
C. Evidence of causation demonstrated by both of the following:
1. headache has developed simultaneously with onset of the partial seizure
2. either or both of the following:
a) headache has significantly improved immediately after the partial seizure has terminated
b) headache is ipsilateral to the ictal discharge
D. Not better accounted for by another ICHD-3 diagnosis.