Objective

Borderline Personality Disorder (BPD) is classified in the DSM-5 as a personality disorder marked by pervasive instability in interpersonal relationships, self-image, and affect, alongside marked impulsivity. The diagnostic criteria require five or more of the following nine symptoms: frantic efforts to avoid abandonment (real or imagined), unstable interpersonal relationships, identity disturbance, impulsive behaviors that are potentially self-damaging, recurrent suicidal behavior or self-harm, affective instability, chronic feelings of emptiness, intense or inappropriate anger, and transient, stress-related paranoia or dissociation. This framework is widely used by clinicians to identify BPD and differentiate it from other disorders, guiding treatment plans that may include Dialectical Behavior Therapy (DBT), medication, and support networks.

Subjective

I recommend reading Loving Someone with Borderline Personality Disorder and I Hate You, Don't Leave Me.

Borderline Personality Disorder (BPD) Glossary
Why is Borderline Personality Disorder Called Borderline?

Studies

Contexts

#borderline-personality-disorder (this is the Root Memo)
#borderline-lexicon (See: Borderline Personality Disorder (BPD) Glossary)
#cluster-b and #cluster-b-personality (See: Cluster B)