Definition of a Personality Disorder:
To understand what borderline personality disorder (BPD) is, you need to understand what makes it constitute as a personality disorder rather than, say a depressive disorder or a psychotic disorder.
There are 10 specific personality disorders as outlined in the Diagnostic and Statistical Manual of Mental Disorders, 5th ed. (DSM-V) one of which includes BPD. Each of these personality disorders are characterized by a pattern of “inner experience and behavior that deviates markedly from the expectations of the individual’s culture.” These deviations are unyielding, extensive, and overwhelming in a way that causes distress and impairment to the person with BPD, and often begins in the adolescent period or early adulthood.
Those ten disorders are then categorized into three groups:
1. The first group have individuals showing signs of odd or eccentric behaviors.
2. The second group have individuals showing signs of dramatic, emotional or erratic behaviors.
3. The third group have individuals who show signs of excessive anxiety and fearfulness.