Personality Disorders Overview
Enduring patterns of thinking, feeling, and behaving that deviate from cultural expectations.
A personality disorder is a pattern of inner experience and behavior that is pervasive, inflexible, stable over time, and leads to distress or impairment in functioning. The traits typically appear in adolescence or early adulthood and remain relatively stable throughout life. Unlike many psychiatric disorders, personality disorders are characterized by traits the client views as ego-syntonic — consistent with their sense of self — which is why insight and motivation for change are often limited.
General Diagnostic Criteria
A pattern of behavior that:
- Deviates significantly from cultural expectations
- Manifests in cognition, affect, interpersonal functioning, or impulse control
- Is pervasive and inflexible across personal and social situations
- Is stable and of long duration, with onset traced back to adolescence or early adulthood
- Causes clinically significant distress or impairment in functioning
- Is not better explained by another mental disorder, substance, or medical condition
The Three Clusters
- Cluster A
- Odd or Eccentric. Disorders: Paranoid, Schizoid, Schizotypal.
- Cluster B
- Dramatic, Emotional, or Erratic. Disorders: Antisocial, Borderline, Histrionic, Narcissistic.
- Cluster C
- Anxious or Fearful. Disorders: Avoidant, Dependent, Obsessive-Compulsive (OCPD).
Cluster A — "Mad" (odd, eccentric, suspicious). Cluster B — "Bad" (dramatic, manipulative, emotional). Cluster C — "Sad" (anxious, fearful, clingy). This is a quick way to remember the general flavor of each cluster.
Key Nursing Considerations Across All Personality Disorders
- Treatment is long-term — personality disorders do not respond quickly
- The client may have limited insight and limited motivation to change
- Psychotherapy is the primary treatment; medications treat co-occurring symptoms (depression, anxiety)
- The nurse-client relationship itself is a therapeutic tool
- Consistency and limit setting among all staff is critical
- Many clients have co-occurring disorders — depression, anxiety, substance use
Every key point in this guide fits on one free printable page. Jump to the free cheatsheet PDF →
Cluster A: Odd or Eccentric
Characterized by suspicious thinking, social detachment, and odd beliefs or behaviors.
- Paranoid Personality Disorder
- Pervasive distrust and suspiciousness of others' motives. Reads hidden meaning into benign remarks. Holds grudges. Reluctant to confide. Nursing: Be honest, consistent, and professional. Avoid being overly friendly or whispering near the client. Explain procedures clearly in advance. Do NOT joke or use sarcasm.
- Schizoid Personality Disorder
- Detachment from social relationships and restricted emotional expression. Loner. Appears cold or indifferent. Lacks close friends. Nursing: Respect need for solitude. Do not push social interaction. Build trust slowly. Recognize that quiet does not mean the client is suffering.
- Schizotypal Personality Disorder
- Eccentric behavior, odd beliefs (telepathy, sixth sense), magical thinking, odd speech patterns, social anxiety. NOT psychotic but on the schizophrenia spectrum. Nursing: Use clear concrete communication. Do not validate magical beliefs but do not argue. Watch for progression to psychotic symptoms.
Cluster A personality disorders do NOT include hallucinations or true delusions. Schizotypal clients have odd beliefs and magical thinking but maintain reality testing. Schizoid clients are socially withdrawn but not psychotic. If a client has true hallucinations or delusions, the diagnosis is schizophrenia or a related psychotic disorder, not a personality disorder.
Cluster B: Dramatic, Emotional, or Erratic
The most commonly tested cluster — especially borderline and antisocial.
- Antisocial Personality Disorder
- Disregard for and violation of others' rights. Deceit, manipulation, impulsivity, aggression, lack of remorse. Often charming. History of conduct disorder before age 15. Nursing: Clear, firm limits without emotional engagement. State expected behavior matter-of-factly. Consistent consequences. Avoid being manipulated by charm or threats. Team communication essential.
- Borderline Personality Disorder
- Instability in relationships, self-image, and emotions. Fear of abandonment, splitting, impulsivity, self-harm, suicidal threats, chronic feelings of emptiness, intense anger. Nursing: Consistent boundaries, frequent staff communication to prevent splitting, validate feelings while setting limits on behavior, safety planning, DBT is gold standard.
- Histrionic Personality Disorder
- Excessive emotionality and attention-seeking. Dramatic, theatrical behavior. Provocative or sexually inappropriate. Shallow, rapidly shifting emotions. Easily influenced by others. Nursing: Set limits on dramatic and attention-seeking behavior. Maintain professional boundaries. Do not reinforce dramatic displays with excessive attention.
- Narcissistic Personality Disorder
- Grandiosity, need for admiration, lack of empathy. Sense of entitlement. Exploits others. Reacts to criticism with rage or shame. Nursing: Maintain professional demeanor. Set firm but respectful limits. Avoid power struggles. Do not feed into grandiosity but do not directly challenge it.
Cluster B clients tend to be the most dramatic and emotionally unstable. They often have intense, unstable relationships and impulsive behavior. Borderline and antisocial overlap in impulsivity but differ in capacity for guilt — borderline clients feel intense guilt and shame, antisocial clients do not.
Cluster C: Anxious or Fearful
Characterized by anxiety, fear, and avoidance of perceived threats.
- Avoidant Personality Disorder
- Social inhibition, feelings of inadequacy, hypersensitivity to negative evaluation. Avoids social situations due to fear of rejection. Wants relationships but is too fearful to engage. Nursing: Build trust gradually. Use positive, non-judgmental approach. Encourage small steps toward social engagement. Praise efforts.
- Dependent Personality Disorder
- Excessive need to be cared for. Submissive, clinging behavior. Difficulty making decisions without reassurance. Fear of being alone. May tolerate abusive relationships. Nursing: Encourage independence in small steps. Foster decision-making skills. Avoid making decisions for the client. Set limits on excessive reassurance-seeking.
- Obsessive-Compulsive Personality Disorder (OCPD)
- Preoccupation with order, perfectionism, and control. Rigid, inflexible. Devotes excessive time to work, neglecting leisure. Hoarding of worthless items. Stubborn. Nursing: Encourage flexibility and acceptance of imperfection. Set realistic goals. Promote self-care and leisure activities.
OCD vs OCPD — Important Distinction
- Awareness
- OCD: Client knows behaviors are excessive (ego-dystonic). OCPD: Client views traits as appropriate and virtuous (ego-syntonic).
- Distress
- OCD: Client is distressed by symptoms and wants relief. OCPD: Client typically does not see traits as problematic.
- Behaviors
- OCD: Specific obsessions and compulsions (hand washing, checking). OCPD: General pattern of perfectionism and rigidity in many areas of life.
- Treatment
- OCD: SSRIs (often high dose), CBT with exposure and response prevention. OCPD: Psychotherapy focused on flexibility and interpersonal patterns.
Borderline Personality Disorder Deep Dive
The most commonly encountered personality disorder in inpatient psychiatric settings.
Diagnostic Criteria (5 or More)
- Frantic efforts to avoid abandonment (real or imagined)
- Pattern of unstable and intense interpersonal relationships with alternating idealization and devaluation
- Identity disturbance — markedly unstable self-image
- Impulsivity in at least 2 areas that are potentially self-damaging (spending, sex, substance use, reckless driving, binge eating)
- Recurrent suicidal behavior, gestures, threats, or self-mutilating behavior
- Affective instability — intense mood reactivity (intense dysphoria, irritability, anxiety lasting hours)
- Chronic feelings of emptiness
- Inappropriate, intense anger or difficulty controlling anger
- Transient stress-related paranoid ideation or dissociative symptoms
Splitting — A Key Defense Mechanism
Splitting is the inability to integrate positive and negative aspects of self or others. People are seen as all good or all bad, with no middle ground. The same staff member who was idealized yesterday ("You are the only one who understands me") may be devalued today ("You are useless and incompetent").
Splitting causes significant problems on inpatient units because clients may tell one nurse that another is mean or incompetent, praise one staff member while criticizing another, or try to get exceptions from "good" staff that "bad" staff would not allow. The result is a divided team. The intervention is frequent team communication — staff must talk regularly about what each is being told and respond consistently as a unit.
Self-Harm in Borderline Personality Disorder
- Self-injurious behavior (cutting, burning) is common
- Usually used to regulate intense emotions — not necessarily an attempt to die
- Provides temporary relief from emotional pain
- Suicide attempts are also common — all threats must be taken seriously
- Approximately 10% of clients with BPD die by suicide
Nursing Interventions Specific to Borderline Personality Disorder
- Establish clear, consistent limits — explain expectations in advance
- Maintain a matter-of-fact, professional demeanor — do not become emotionally entangled
- Validate feelings without validating behavior — "I understand you are angry, but I cannot let you hit the wall"
- Frequent team meetings to prevent staff splitting
- Identical responses from all staff — rules apply equally
- Safety planning — assess suicide risk regularly, remove means of self-harm
- Teach coping skills — distress tolerance, emotion regulation
- Refer to DBT (dialectical behavior therapy) — the gold standard treatment
- Address co-occurring conditions — depression, anxiety, PTSD, substance use are common
Dialectical Behavior Therapy (DBT)
- The most effective treatment for BPD
- Developed by Marsha Linehan
- Four skill modules: mindfulness, distress tolerance, emotion regulation, interpersonal effectiveness
- Combines individual therapy with skills groups
- Focuses on building a life worth living
Antisocial Personality Disorder Deep Dive
Pervasive disregard for and violation of the rights of others.
Diagnostic Criteria
- Age 18 or older
- Evidence of conduct disorder before age 15 (lying, stealing, aggression, rule-breaking)
- Three or more of the following:
- Failure to conform to social norms (repeatedly performs unlawful acts)
- Deceitfulness — repeated lying, conning others for personal gain
- Impulsivity or failure to plan ahead
- Irritability and aggressiveness (fights, assaults)
- Reckless disregard for safety of self or others
- Consistent irresponsibility (work, financial obligations)
- Lack of remorse for harm caused to others
Key Behavioral Characteristics
- Often charming and superficially likable on first meeting
- Manipulative — uses charm, intimidation, or guilt to get what they want
- Lacks empathy — difficulty understanding or caring about others' feelings
- Glib speech — smooth talker, persuasive
- Lacks remorse — does not feel guilt about harmful actions
- Externalizes blame — others are always at fault
- Pathological lying — lies even when there is no apparent reason
- May be highly intelligent — uses intelligence to manipulate
Clients with antisocial personality disorder require limits that are clear (state the rule simply), firm (do not negotiate or make exceptions), consistent (all staff respond the same way every time), matter-of-fact (without anger, lectures, or emotional engagement), and followed with consequences. Avoid attempting to appeal to conscience, guilt, or empathy — these are typically not effective.
What NOT to Do
- Do NOT engage in lengthy discussions of feelings or motivations
- Do NOT lecture or moralize
- Do NOT try to appeal to conscience or guilt
- Do NOT show emotional reaction to manipulation attempts
- Do NOT make exceptions or deals
- Do NOT believe everything the client says (manipulation is common)
- Do NOT take charming behavior at face value
- Do NOT work alone or in isolated areas if possible
Sample Therapeutic Responses
- "Come on, just bend the rules this one time."
- "The rules apply equally to everyone. The answer is no."
- "You're the only good nurse here. The others are idiots."
- "We all follow the same plan of care."
- "If you don't give me what I want, I'll tell your supervisor you were rude."
- "You may speak with the supervisor if you wish. The answer is still no."
Core Nursing Interventions Across Personality Disorders
Principles that apply to almost every personality disorder you'll encounter.
Safety First
- Assess suicide risk regularly — especially for borderline personality disorder
- Monitor for self-harm
- Remove access to means of self-harm (sharps, cords)
- Watch for impulsive behaviors (Cluster B)
- Consider aggression risk with antisocial clients
Therapeutic Relationship
- Maintain professional boundaries consistently
- Be honest and reliable — do what you say
- Acknowledge feelings without endorsing problematic behavior
- Avoid being overly nurturing with dependent clients
- Avoid being too friendly with paranoid clients
- Resist being idealized or devalued by borderline clients
- Do not be charmed or manipulated by antisocial clients
Limit Setting
- State limits clearly and simply at the start
- Limits should be realistic and enforceable
- Apply limits consistently — same rules for everyone
- Follow through with consequences
- Avoid punishment — use natural consequences
- Document limit-setting interactions
Team Communication
- Hold regular team meetings — daily for high-acuity clients
- Share information openly about what clients are telling each staff member
- Develop a unified plan of care that all staff follow
- Identify and address splitting early
- Support each other in maintaining consistent limits
- Document interventions and client responses in shared records
Medications
Personality disorders themselves are not directly treated with medication. However, medications are commonly used for co-occurring symptoms:
- SSRIs — for depression, anxiety, or mood symptoms
- Mood stabilizers — for emotional instability and impulsivity (often in BPD)
- Antipsychotics — low doses sometimes used for severe symptoms in BPD
- Avoid benzodiazepines — especially in BPD and antisocial PD due to risk of dependence and disinhibition
For NCLEX-PN questions on personality disorders, look for answers that include: setting clear limits, maintaining consistency, validating feelings without endorsing behavior, communicating with the team, and prioritizing safety. Avoid options that involve lengthy discussions, emotional confrontation, making exceptions, or trying to "fix" the personality.
? A client with BPD tells you "You're the only nurse who really cares about me. The night nurse is cruel." How should you respond?
Frequently Asked Questions
Common student questions on this topic.
What are the three clusters of personality disorders?
What is the key feature of borderline personality disorder?
How is antisocial personality disorder different from sociopathy or psychopathy?
What is the difference between schizoid and schizotypal personality disorder?
How do I handle a patient who is splitting staff?
What is the difference between narcissistic and histrionic personality disorder?
Quick-Reference Cheatsheet
Every key point from this guide on a single printable page.
Personality Disorders Cheatsheet
One-page PDF — free download.