4.6.3 Probable external-pressure headache

Diagnostic criteria:
A. Either of the following:

    1. a single episode of headache fulfilling criteria B-D
    2. at least two episodes of headache fulfilling criterion B and either but not both of criteria C and D

B. Brought on by and occurring only during sustained external compression of or traction on the forehead and/or scalp
C. Maximal at the compression or traction site
D. Resolving within 1 hr after compression or traction is relieved
E. Not fulfilling ICHD-3 criteria for any other headache disorder
F. Not better accounted for by another ICHD-3 diagnosis.

Codable subforms are Probable external-compression headache and Probable external-traction headache.