4.8.1 Probable nummular headache

Diagnostic criteria:
A. Continuous or intermittent head pain fulfilling criterion B
B. Felt exclusively in an area of the scalp, with three of the following four characteristics:

    1. sharply-contoured
    2. fixed in size and shape
    3. round or elliptical
    4. 1-6 cm in diameter

C. Not fulfilling ICHD-3 criteria for any other headache disorder
D. Not better accounted for by another ICHD-3 diagnosis.