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Definition
By Mayo Clinic staffThunderclap headaches live up to their name, grabbing your attention like a boom of thunder. The pain of these sudden, severe headaches peaks within 60 seconds and usually fades over several hours. Some of these headaches, however, can last for more than a week.
Thunderclap headaches are uncommon, but they can be a warning sign of potentially life-threatening conditions — usually having to do with bleeding in and around the brain. That's why it's so important to seek emergency medical attention if you experience a thunderclap headache.
