DefinitionBy Mayo Clinic staff
Thunderclap headaches live up to their name, grabbing your attention like a clap of thunder. The pain of these sudden, severe headaches peaks within 60 seconds and can start fading after an hour. 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.
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