Pathological jealousy

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Pathological jealousy, also known as morbid jealousy, Othello syndrome, or delusional jealousy, is a psychological disorder in which a person is preoccupied with the thought that their spouse or romantic partner is being unfaithful without having any real or legitimate proof,^[1] along with socially unacceptable or abnormal behaviour related to these thoughts.^[1] The most common cited forms of psychopathology in morbid jealousy are delusions and obsessions. It is considered a subtype of delusional disorder.^[1]