Headache is conventionally classified as primary (including migraine, tension-type headache, and trigeminal autonomic cephalgias), secondary (including headaches associated with cerebrovascular disease, intracranial neoplasm, trauma, and infection), and cranial neuralgias (including trigeminal neuralgia). Management of secondary headaches is usually straightforward, but the pathophysiology of primary headaches is not well understood, and treatment is often unsatisfactory.
KeywordsHistamine Caffeine Psoriasis Vasculitis Verapamil
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