Final answer:
Susan was diagnosed with Borderline Personality Disorder based on symptoms such as unstable moods, self-image, and relationships. BPD is characterized by a set of criteria in the DSM, with treatment typically involving psychotherapy and possibly medication for symptom management.
Step-by-step explanation:
Susan was diagnosed with Borderline Personality Disorder (BPD), a mental health condition characterized by certain symptom criteria. The diagnosis is likely based on her exhibiting abrupt shifts in mood, a poorly developed self-image, and intense and unstable relationships. These are among the core symptoms identified in the Diagnostic and Statistical Manual of Mental Disorders (DSM) used by mental health professionals to diagnose BPD. Additional symptoms might include chronic feelings of emptiness, explosive anger, self-harming behaviors, and a chronic fear of abandonment. It's important to note that Dana Becker raises concerns about the diagnosis being potentially overused or misused, especially for women, due to preconceived biases.
As BPD is an enduring pattern of behavior that leads to significant distress or impairment and is not attributable to substance use or another medical condition, it is diagnosed based on a persistent pattern of instability in interpersonal relationships, self-image, and affects, as well as marked impulsivity. Should Susan seek treatment, options typically include psychotherapy, and in some cases, medication to help manage specific symptoms.