Primary | ||
---|---|---|
>4 hours daily | <4 hours daily | Secondary |
*May be complicated by analgesic overuse. In the case of substance abuse headache, the headache is completely resolved after the substance abuse is controlled.8 Clinical experience suggests that many patients continue to have headache even after cessation of analgesic use. The residual headache probably represents the underlying headache biology. | ||
†Chronic cluster headache patients may have more than 4 hours per day of headache. The inclusion of the syndrome here is to emphasise that, by and large, the attacks themselves are less than four hours duration. | ||
SUNCT, short lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing. | ||
Chronic migraine* | Chronic cluster headache† | Post-traumatic
|
Chronic tension type headache* | Chronic paroxysmal hemicrania | Inflammatory, such as:
|
Hemicrania continua* | SUNCT | Chronic CNS infection |
New daily persistent headache* | Hypnic headache | Substance abuse headache* |