Borderline Personality Disorder (BPD) is a complex mental health condition characterized by pervasive instability in emotions, relationships, self-image, and impulse control. Individuals often experience intense fear of abandonment, rapidly shifting moods, chronic feelings of emptiness, and difficulty regulating anger or distress. Self-harming behaviors and suicidal ideation are common, particularly in response to perceived rejection or loss. Effective treatment focuses on developing emotional regulation, distress tolerance, and interpersonal stability through structured, evidence-based psychotherapy.