Table 1 The International Classification of Headache Disorders 3^rd Edition (ICHD-3) diagnostic criteria for persistent headache attributed to traumatic injury to the head [6]

A.

Any headache fulfilling criteria C and D

B.

Traumatic injury to the head has occurred

C.

Headache is reported to have developed within 7 days after one of the following:

1. The injury to the head

2. Regaining consciousness following injury to the head

3. Discontinuation of medication(s) impairing ability to sense or report headache following injury to the head

D.

Headache persists for > 3 months after its onset

E.

Not better accounted for by another ICHD-3 diagnosis