Sudden Onset Migraine Headaches

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What's a Thunderclap Headache?

Thunderclap headache (TCH) refers to an excruciating headache of instantaneous onset—as sudden and as unexpected as a “clap of thunder.” It is a form of headache that should never be ignored, but should always be thoroughly investigated.


The term "thunderclap headache" was first used to describe this headache as a symptom of an unruptured cerebral aneurysm. Since then, some other disorders have been noted to also present with TCH. Those disorders include:

  • subarachnoid hemorrhage...
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