Hysteria, in its colloquial use, describes a state of mind, one of unmanageable emotional excesses. People who are "hysterical" often lose self-control due to an overwhelming fear that may be caused by multiple events in one's past that involved some sort of severe conflict; the fear can be centered on a body part, or, most commonly, on an imagined problem with that body part. Disease is a common complaint; see also Body dysmorphic disorder and Hypochondriasis.
OmegaWiki Dictionary
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hysteria Behavior exhibiting excessive or uncontrollable emotion, such as fear or panic.
