Which combination of red-flag features most strongly suggests a secondary headache requiring urgent evaluation?

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Multiple Choice

Which combination of red-flag features most strongly suggests a secondary headache requiring urgent evaluation?

Red flags for secondary headaches signal possible dangerous underlying problems that need urgent assessment. A thunderclap onset means the pain peaks within seconds to minutes, a pattern classic for catastrophic events such as subarachnoid hemorrhage. When the headache is new and begins after age 50, the suspicion for serious causes like intracranial hemorrhage or inflammatory vascular conditions (for example giant cell arteritis) increases even more. Therefore, the combination of sudden thunderclap onset plus a new headache in someone over 50 points most strongly toward an urgent need for evaluation. In contrast, gradual onset over weeks with a stable pattern is more typical of chronic primary headaches, and photophobia that improves with rest fits a benign migraine pattern rather than an emergent secondary cause.

Red flags for secondary headaches signal possible dangerous underlying problems that need urgent assessment. A thunderclap onset means the pain peaks within seconds to minutes, a pattern classic for catastrophic events such as subarachnoid hemorrhage. When the headache is new and begins after age 50, the suspicion for serious causes like intracranial hemorrhage or inflammatory vascular conditions (for example giant cell arteritis) increases even more. Therefore, the combination of sudden thunderclap onset plus a new headache in someone over 50 points most strongly toward an urgent need for evaluation.

In contrast, gradual onset over weeks with a stable pattern is more typical of chronic primary headaches, and photophobia that improves with rest fits a benign migraine pattern rather than an emergent secondary cause.

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