9.1.1.3 Persistent headache attributed to past bacterial meningitis or meningoencephalitis

Diagnostic criteria:
A. Headache previously fulfilling criteria for 9.1.1 Headache attributed to bacterial meningitis or meningoencephalitis, and fulfilling criterion C below
B. Bacterial meningitis or meningoencephalitis has resolved
C. Headache has persisted for >3 months after resolution of the bacterial meningitis or meningoencephalitis
D. Not better accounted for by another ICHD-3 diagnosis.