A personality disorder is an enduring, pervasive pattern of inner experience and behaviour that deviates markedly from the expectations of an individual's culture, is inflexible across a broad range of situations, has an onset traceable to adolescence or early adulthood, remains relatively stable over time, and lead…
A personality disorder is an enduring, pervasive pattern of inner experience and behaviour that deviates markedly from the expectations of an individual's culture, is inflexible across a broad range of situations, has an onset traceable to adolescence or early adulthood, remains relatively stable over time, and leads to clinically significant distress or impairment in functioning. The pattern manifests across cognition, affect, interpersonal functioning, and impulse control, producing difficulties in emotional regulation, identity, and relationships. Classification systems group personality disorders into clusters, encompassing odd or eccentric, dramatic or erratic, and anxious or fearful presentations, while dimensional models increasingly characterize them by maladaptive personality traits and severity rather than discrete categories alone. Their development is understood through the interaction of genetic, temperamental, and neurobiological vulnerabilities with adverse developmental and environmental experiences, and the consolidation of identity in adolescence is recognized as a critical period whose disruption can predispose to identity diffusion, aggression, and depression. Personality disorders frequently coexist with mood, anxiety, trauma-related, and substance-use disorders, and are associated with elevated risk of self-harm and suicide, complicating assessment and care. Management centres on structured, evidence-based psychotherapies that target emotional regulation and interpersonal functioning, supported where appropriate by treatment of comorbid conditions, with the aims of reducing distress, improving stability, and enhancing long-term psychosocial functioning.
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