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 220.127.116.11 Probable external-compression headache and 18.104.22.168 Probable external-traction headache.