title: The hidden danger of a sudden, severe headache.  It could signal a ruptured aneurysm that needs fast emergency care.
mesh_terms: D017542:Aneurysm, Ruptured / Q000150:complications* / Q000175:diagnosis / Q000628:therapy*; D001294:Attitude to Health; D004636:Emergency Service, Hospital; D005260:Female; D006261:Headache / Q000209:etiology*; D015438:Health Behavior; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications* / Q000175:diagnosis; D008297:Male; D008875:Middle Aged