Headache resulting from sustained compression of pericranial soft tissues, for example by a tight band around the head, hat or helmet, or goggles worn during swimming or diving, without damage to the scalp.
A. At least two episodes of headache fulfilling criteria B-D
B. Brought on by and occurring within 1 hr during sustained external compression of the forehead or scalp
C. Maximal at the site of external compression
D. Resolving within 1 hr after external compression is relieved
E. Not better accounted for by another ICHD-3 diagnosis.