What defines Delusional Disorder?

Delusional Disorder is characterized primarily by the presence of a single delusion that persists for a duration of at least one month. This means that the individual holds a fixed, false belief that is not consistent with reality and that is not a result of other mental disorders. The focus on a singular delusion distinguishes Delusional Disorder from other psychotic disorders where multiple symptoms, such as hallucinations or disorganized thinking, may be present.

This diagnosis emphasizes the sustained nature of the delusion, which allows for a clear differentiation from broader psychotic conditions like Schizophrenia, where multiple psychotic symptoms are evident. Additionally, while some degree of functional impairment can occur in Delusional Disorder, it is not a requisite criterion for diagnosis, as many individuals can often continue with their daily lives relatively intact despite their delusions. Understanding these specific criteria is crucial for accurate diagnosis and treatment.