Migraine Headache FAQs Topic Guide
Worst Headache of Your Life The worst headache of your life may be a life-threatening emergency. Symptoms such as a headache with fever and a stiff neck, a headache that starts with a thundeclap, a headache following a head injury, a headache with loss of vision or numbness of the arms or legs, or a headache with a fever (not caused by the flu) are emergent medical conditions. Treatment of the worst headache of your life depends on the cause of the headache.
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