Hysteria, in its colloquial use, describes a state of mind, one of unmanageable fear or emotional excesses. The fear is often 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. People who are “hysterical” often lose self-control due to the overwhelming fear.
Psychiatrists and other physicians have in theory given up the use of “hysteria”, replacing it with more accurate terms such as somatization disorder. In 1980 the American Psychiatric Association officially changed the diagnosis of “hysterical neurosis, conversion type” to “conversion disorder”.

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