Diagnosis of Borderline Personality Disorder

A licensed mental health professional—such as a psychiatrist, psychologist, or clinical social worker—experienced in diagnosing and treating mental disorders can diagnose borderline personality disorder by:

  • Completing a thorough interview, including a discussion about symptoms
  • Performing a careful and thorough medical exam, which can help rule out other possible causes of symptoms
  • Asking about family medical histories, including any history of mental illness

 

Borderline personality disorder often occurs with other mental illnesses. Co-occurring disorders can make it harder to diagnose and treat borderline personality disorder, especially if symptoms of other illnesses overlap with the symptoms of borderline personality disorder. For example, a person with borderline personality disorder may be more likely to also experience symptoms of depression, bipolar disorder, anxiety disorders, substance use disorders, or eating disorders.

Resource: National Institute of Mental Health