Personality Disorders

The patient with borderline personality disorder tells you you're the best nurse on the unit — then files a complaint about you an hour later. Understanding why this happens changes everything about your approach.

Personality disorders are enduring, inflexible patterns of behavior and inner experience that deviate from cultural expectations, cause distress or impairment, and affect functioning across settings. For NCLEX, the three clusters matter: Cluster A (odd/eccentric — paranoid, schizoid, schizotypal), Cluster B (dramatic/erratic — borderline, antisocial, histrionic, narcissistic), and Cluster C (anxious/fearful — avoidant, dependent, obsessive-compulsive). Borderline personality disorder (BPD) is the most tested. Key features include unstable relationships, fear of abandonment, splitting (idealizing then devaluing staff), impulsivity, self-harm, and identity disturbance. Dialectical behavior therapy (DBT) is the evidence-based treatment; medications are adjunctive only — PDs are primarily treated with psychotherapy. The nursing approach centers on consistency: set clear, firm boundaries from the start and enforce them uniformly across the care team. Avoid power struggles and personal reactions to manipulation or splitting. Use matter-of-fact communication — acknowledge feelings without reinforcing maladaptive behavior. Document behavioral expectations and ensure all staff follow the same plan. Therapeutic relationships require maintaining professional distance while still conveying empathy. The nurse's own emotional response (countertransference) is a major clinical hazard — feeling angry, helpless, or overly protective signals you need peer consultation.

Key Distinctions

Don't confuse splitting (BPD — pitting staff against each other) with manipulation in antisocial PD (calculated, goal-directed, lacks remorse). Students mistake firm limit-setting for being punitive — limits are therapeutic, not punishment. Avoidant PD looks like social anxiety disorder, but avoidant PD is a pervasive lifelong pattern across all relationships, not situation-specific anxiety.

Clinical Pearl

When a BPD patient splits the team, the fix is a staff meeting, not a patient confrontation. Consistency across all shifts dismantles splitting faster than any intervention with the patient alone.