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How Can You Tell If Someone Else Has Borderline Personality Disorder?

How Can You Tell If Someone Else Has Borderline Personality Disorder?

Borderline personality disorder (BPD) is a serious psychological condition that is listed in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5). It is characterized by pervasive instability in moods, emotions, behaviors, and interpersonal relationships. Individuals with borderline personality disorder feel prolonged, intense emotions and are unable to return to a neutral emotional baseline after facing an emotionally triggering event. This can affect all areas of one’s life as the duration it takes an individual with BPD to process, integrate, and recover from emotional challenges is elongated. Individuals with a borderline personality disorder often struggle with relationship issues, lack self-esteem, have a poor self-image, and have an inability to appropriately self-regulate.

Signs and Symptoms

There are common signs and symptoms associated with BPD. An individual with a borderline personality disorder may exhibit any combination of the following examples, provided by the Mayo Clinic

  • Ongoing feelings of emptiness
  • Risky behavior (e.g., gambling, having unsafe sex, etc.)
  • Intense fear of being alone or abandoned
  • Fragile self-image
  • Unstable relationships
  • Erratic moods
  • Frequent displays of intense anger
  • Stress-related, fleeting paranoia
  • Suicidal behavior
  • Threats of self-injury

The symptoms that manifest because of borderline personality disorder often mimic those of other mental health disorders (e.g., histrionic personality disorder, narcissistic personality disorder, bipolar personality, etc.). 

DSM-5 Diagnostic Criteria

There is no definitive medical test to diagnose borderline personality disorder. According to the DSM-5, a borderline personality disorder is diagnosed when an individual experiences “a pervasive pattern of instability of interpersonal relationships, self-image and affects, and marked impulsivity beginning by early adulthood” and must experience five or more of the following symptoms in a variety of contexts:

  • Emotional instability
  • Feelings of emptiness
  • Efforts to avoid abandonment
  • Impulsive behaviors
  • Identity disturbances
  • Inappropriate, irrational, and/ or intense bouts of anger
  • Transient paranoid and/ or dissociative symptoms
  • Unstable interpersonal relationships
  • Suicidal and/ or self-harming behaviors

Due to its elusive nature, a borderline personality disorder can be extremely difficult to diagnose. As such, to obtain the most accurate mental health diagnosis it is imperative to undergo a comprehensive evaluation that is conducted by one or more qualified mental health professionals. 

For Information and Support

Every family in need of mental health treatment must select a program that will best suit the needs of their family. When one member of a family struggles, it impacts everyone in the family unit. To maximize the benefits of treatment we work closely with the entire family to ensure that everyone is receiving the support they need through these difficult times.

Seeking help is never easy, but you are not alone! If you or someone you know needs mental health treatment, we strongly encourage you to reach out for help as quickly as possible. It is not uncommon for many mental health difficulties to impact a person’s life in, long term. Pursuing support at the beginning of one’s journey can put the individual in the best position to learn how to manage themselves in a healthy way so they can go on to live happy and fulfilling lives.


We are available to answer any questions you may have regarding mental health treatment and our residential program, anytime. Contact us today using the form to the right.

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