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Brain fever (or cerebral fever) is an outdated medical term that was used as a synonym for phrensy, beginning in early 19th century medical literature. Supposedly the brain becomes inflamed and causes a variety of symptoms, most notably mental confusion, and can lead to death. The terminology is romanticized in Victorian literature, where it typically describes a potentially life-threatening illness brought about by a severe emotional upset, and much less often fatal than in medicine.[1][2]
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