Abstract
Hemicrania continua is a primary headache disorder that is classified as a trigeminal autonomic cephalgia that shares characteristics of both cluster headache and migraine headache (Table 4.1). Similar to cluster headache, hemicrania continua is a severe, unilateral headache with associated signs of autonomic dysfunction including lacrimation, scleral injection, eyelid ptosis, nasal stuffiness syndrome. In contrast to cluster headache, which occurs 10 times more commonly in men, hemicrania continua occurs more commonly in women, a characteristic it shares with migraine. Like migraine headache, hemicranias continua is associated with nausea and vomiting as well as sonophobia and phonophobia. Unlike the pain of cluster and migraine headache, the pain of hemicraina continua is continuous with intermittent severe exacerbations of pain. This pain is unilateral and is side-locked, that is that it does not change sides like migraine headache occasionally does. Hemicrania continua is an indomethacin responsive headache, with complete resolution of headache and fassociated symptoms with therapeutic doses of indomethacin.
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