What is the etiology of the delusional disorder?

The etiology of delusional disorder is not fully understood, but it is believed to involve a combination of genetic, biological, and environmental factors. Neurotransmitter imbalances, particularly involving dopamine, may play a significant role in the development of delusional beliefs. Additionally, stressful life events, social isolation, and certain personality traits can contribute to the onset of the disorder. Family history of mental illness may also increase susceptibility.