PTSD and Borderline Personality Disorder

Symptoms, Co-Occurrence and Treatment

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Post-traumatic stress disorder (PTSD) and borderline personality disorder (BPD) commonly occur together. It has been found that many individuals with PTSD also exhibit BPD, and conversely, a diagnosis of PTSD is quite common among people with BPD.

What Is Borderline Personality Disorder?

Borderline personality disorder has been receiving more attention in the media over the years and has been featured in movies like Girl Interrupted. BPD is part of a special class of mental disorders that are referred to as personality disorders by the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5). According to the DSM-5, personality disorders represent a long-standing pattern of problematic behaviors, thoughts and feelings that often start in adolescence or early adulthood.

Symptoms of BPD

Borderline personality disorder is made up of the following symptoms:

  1. Persistent and extreme efforts to avoid real or imagined abandonment by others.
  2. A pattern of unstable, intense, and stormy relationships where the person may frequently shift between idealizing and devaluing their partner.
  3. Problems with identity or an unstable self-image or sense of who one really is.
  4. Being impulsive in ways that are problematic or damaging, for example, engaging in substance use, sexual promiscuity, reckless driving or binge eating.
  5. Reoccurring suicidal acts or threats or engaging in deliberate self-harm.
  6. Frequent and intense mood swings.
  7. Constant feelings of emptiness.
  8. The intense experience of anger and/or difficulties controlling anger.
  9. Paranoia or dissociation that comes and goes as a result of experiencing stress.

To receive a diagnosis of BPD, you need to exhibit at least five of these symptoms. Of course, as with all mental disorders, only a mental health professional can provide a diagnosis of BPD.

The Co-Occurrence of BPD and PTSD

One study of veterans with combat-related PTSD seeking treatment found that 76% of them also had a diagnosis of BPD. Likewise, another study found that approximately 56% of individuals with BPD also have a diagnosis of PTSD. Different studies have varied widely in percentages of people with both disorders, however, so the exact figures are unknown, but there is clearly an overlap between the two diagnoses.

Why are these two disorders so interrelated? BPD and PTSD have both been found to stem from the experience of traumatic events. The thoughts, feelings and behaviors seen in BPD are often the results of childhood traumas. These childhood traumas may also place a person at risk for developing PTSD. In fact, people with both BPD and PTSD report earlier experience of trauma as compared to people with just PTSD.

The impulsive behaviors and unstable relationships seen among people with BPD may also place a person at greater risk for experiencing a traumatic event such as a motor vehicle accident, physical assault or sexual assault.

Finally, the symptoms of PTSD and BPD also overlap. For example, individuals with PTSD may have difficulties managing their emotions. Therefore, they may experience intense feelings and have constant mood swings. They may also experience problems with anger. People with PTSD, especially those who lost a loved one, may also begin to fear abandonment.

Treatment for BPD

There are two well-supported treatments for BPD: Dr. Marsha Linehan's dialectical behavior therapy (DBT) and Drs. Anthony Bateman and Peter Fonagy's mentalization-based treatment (MBT). Studies have yet to examine whether these treatments are also effective in reducing PTSD symptoms; however, many of the skills taught in these treatments, like emotion regulation, emotional awareness and effective interpersonal relationships, may address some of the problems seen among people with PTSD too. 

Learn more about BPD and its treatment, including those treatments listed here, at The National Education Alliance for Borderline Personality Disorder and The Borderline Personality Disorder Resource Center.

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