Emergency evaluation of the adult with new nontraumatic headache

The evaluation of new-onset nontraumatic headache involves assessing for secondary (eg, structural, inflammatory) causes as well as identifying primary headache syndromes.

SAH: subarachnoid hemorrhage; CO: carbon monoxide; ICH: intracranial hemorrhage; CVT: cerebral venous thrombosis; HIV: human immunodeficiency virus.

* Primary headache syndromes include migraine and related conditions, tension-type headaches, trigeminal autonomic cephalalgias (cluster headache, paroxysmal hemicrania, short-lasting unilateral neuralgiform headache attacks, and hemicrania continua), and less common primary headache disorders (eg, new persistent daily headache, primary cough headache, primary exercise headache). Refer to UpToDate topics for additional details.

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Emergency evaluation of the adult with new nontraumatic headache