History of "Borderline"


The term “borderline” was first introduced in the United States in 1938. It was a term used by early psychiatrists to describe people who were thought to be on the “border” between diagnoses, mostly psychosis and neurosis. At the time, people with neurosis were believed to be treatable, whereas people with psychoses were deemed untreatable.

Then, in the 1970s, a deeper understanding of borderline personality disorder began to emerge. People with BPD were described as being very emotional, needy, difficult, at risk for suicide, and to have an overall unstable level of functioning. 


Soon, a pattern of symptoms began to emerge to describe those with borderline personality disorder. These included: 

  • Rapid shifts from periods of confidence to total despair 
  • Unstable self-image
  • Rapidly fluctuating mood swings
  • Fear of abandonment
  • Strong tendency for both self-harm and suicidal thinking

In 1980, BPD became an official personality disorder in the Diagnostic and Statistical Manual of Mental Disorders III or DSM-III.Overview of the DSM


Borderline Personality Disorder Today

Today far more is known about BPD. The term “neurosis” is no longer used in our diagnostic system, and BPD is no longer thought of as being a psychotic disorder.


Now BPD is recognized as a disorder characterized by intense emotional experiences and instability in relationships and behavior that begins in early adulthood and manifests itself in multiple contexts (for example, at home, and at work).

In addition, experts have recognized that there is a strong genetic component to BPD—meaning it can run in families.

According to the DSM-5, in order to be diagnosed with BPD, a person must meet these criteria:

  • Have an impairment in either identity (sense of self) or self-direction (for example, life goals).
  • Have an impairment in interpersonal functioning with either empathy (unable to recognize feelings of others) or intimacy (intense, unstable and conflicted relationships).

In addition, a person must have the following pathological personality traits:

  • Negative affectivity: characterized by frequent mood changes, anxiousness, fear of rejection, feeling down frequently, and suicidal thoughts and behavior
  • Disinhibition: characterized by impulsivity and risk-taking (for example, spending sprees, sex)
  • Antagonism: characterized by hostility (for example, anger in response to a minor insult)

The Ongoing Debate 

The term “borderline” is still debated by some people. Many experts are now calling for BPD to be renamed because they believe the term “borderline” is outdated. Some believe that BPD should not be classified as a personality disorder, but rather as a mood disorder, or an identity disorder.

Suggestions for the new name have included:

  • Emotion Dysregulation Disorder 
  • Unstable Personality Disorder
  • Impulse Spectrum Disorder
  • Complex Post-Traumatic Stress Disorder

BPD and Identity Problems

What Does This Mean for You If You Have BPD?

It’s important to not get too hung up on the term “borderline.” The term is old and may be changed in the future. Instead, focus on working with your doctor or therapist in receiving the proper therapy and getting all your questions answered so that you can get healthy. 

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