Erotomania is a type of delusion in which the affected person believes that another person, usually a stranger, high-status or famous person, is in love with him or her. The illness often occurs during psychosis, especially in patients with schizophrenia, delusional disorder or bipolar mania.
During an erotomanic episode, the patient believes that a “secret admirer” is declaring his or her affection to the patient, often by special glances, signals, telepathy, or messages through the media. Usually the patient then returns the perceived affection by means of letters, phone calls, gifts, and visits to the unwitting recipient. Even though these advances are unexpected and unwanted, any denial of affection by the object of this delusional love is dismissed by the patient as a ploy to conceal the forbidden love from the rest of the world.
In some cases, the sufferer may believe several people at once are “secret admirers.” The sufferer may also experience other types of delusions concurrently with erotomania, such as delusions of reference, wherein the perceived admirer secretly communicates his or her love by subtle methods such as body posture, arrangement of household objects, and other seemingly innocuous acts (or, if the person is a public figure, through clues in the media).
The assassination attempt of Ronald Reagan by John Hinckley, Jr. was reported to have been driven by an erotomanic delusion to Jodie Foster.