Apersonality disorderis a mental health condition characterized by long-lasting patterns of inner experience and behavior.
This article will discuss cluster B personality disorders, including their traits, causes, diagnosis, and treatment.
A person may have two or more comorbid cluster B personality disorders or personality disorders across multiple clusters.

LordHenriVoton / Getty Images
Cluster B Personality Disorder Traits
Each of the four cluster B personality disorders is different.
However, they tend to share certain maladaptive personality traits in common.
Most people are not diagnosed with personality disorders until they are 18 years old or older.
To be diagnosed with a personality disorder, your symptoms must have lasted a specific amount of time.
Treatment for HPD, ASPD, BPD, and NPD typically starts with psychotherapy.
If you or someone else is at immediate risk, dial911.
Outlook for Cluster B Personality Disorder
Cluster B personality disorders are lifelong (chronic).
They are not curable, but people may go into remission if their symptoms are well controlled.
Some personality disorder symptoms can peak during adolescence and may become less pronounced as a person gets older.
Some personality disorders tend to have better outlooks than others.
Keep triggers in mind when youre interacting with someone with a personality disorder.
Every personality disorder is associated with different possible emotional triggers.
The triggers you should watch for will depend on what personality disorder a person has.
Lend the person a friendly listening ear, but set boundaries with them.
You may want to talk to a therapist and reach out to your support system.
If your safety is at risk, ask for help and leave the situation as soon as possible.
The first-line treatment for cluster B personality disorders is psychotherapy.
In some cases, medication may be prescribed to help with certain symptoms.
National Institute of Mental Health.Personality disorders.
American Psychiatric Association.What are personality disorders?
American Psychological Association.Borderline personality disorder.
American Psychological Association.Histrionic personality disorder.
2017;43(3):156-164. doi:10.1080/08964289.2017.1301875
American Psychological Association.Narcissistic personality disorder.
2018;25(5):706-723. doi:10.1080/13218719.2018.1474816
Schnittker J, Larimore SH, Lee H.Neither mad nor bad?
The classification of antisocial personality disorder among formerly incarcerated adults.Soc Sci Med.
2020;264:113288. doi:10.1016/j.socscimed.2020.113288
American Psychological Association.Antisocial personality disorder.
Hengartner MP.The detrimental impact of maladaptive personality on public mental health: a challenge for psychiatric practice.Front Psychiatry.
2015;9:472. doi:10.3389/fnhum.2015.00472
American Psychological Association.Personality disorder.
2015;112(12):3659-3662. doi:10.1073/pnas.1420870112
SAMHSA.Antisocial personality disorder.
American Psychiatric Association.What Are Personality Disorders?
NHS.Diagnosis - borderline personality disorder.
Biskin RS.The lifetime course of borderline personality disorder.Can J Psychiatry.
2018;58:72-78. doi:10.1016/j.ijlp.2018.03.002
Laceulle OM.Adolescence as a peak period of borderline personality features?
A meta-analytic approach.European Journal of Personality.
2018.Journal of Primary Care & Community Health.doi:10.1177/2150132718776877
Royal College of Psychiatrists.Personality disorder.