Case in point: Claire’s life is often chaotic and unstable. She cuts her hair short and unkempt. She said that when things didn’t go her way, she would cut her hair hard, which helped her fill the void. I later found out that she often hurt herself. Later, she was admitted to a psychiatric hospital because she developed suicidal tendencies. Some studies show that people with borderline personality disorder make up about 1 to 3 percent of the general population and is the most common type of personality disorder in clinical practice. It begins in early adulthood and is highlighted by marked emotional instability, extremely unstable interpersonal relationships, impulsive and self-destructive and suicidal behavior, and confusion in self-perception, while patients sometimes develop temporary, paranoid notions related to psychological stress or severe dissociative symptoms. A growing body of research now confirms that borderline personality disorder is the result of the interaction of genetic factors with family and social environmental factors. The psychoanalytic school pays particular attention to the poor psychological development resulting from problems in the mother-child relationship during early childhood. If the mother fails to correctly understand and respond appropriately to the meaning expressed by the child’s behavior and speech, and fails to provide a stable and loving environment during the development of the young child, the child will not gradually develop a sense of internal self-monitoring and self-worth. Without a stable sense of self in adulthood, the child will continue to seek external protection, becoming “deeply emotionally starved” and “walking into life with an umbilical cord in his or her hand. In addition, more research has found that borderline personality disorder is a consequence of early trauma, such as the loss of both parents at an early age and physical abuse, especially in women. Once the diagnosis of borderline personality disorder is established, it should be treated aggressively, with the basic treatment principle being psychotherapy as the primary treatment and medication as the secondary treatment. Psychotherapy includes analytic therapy, group therapy, family therapy, discriminative behavior therapy and social reintegration therapy. Among them, the main purpose of discriminative behavior therapy is to help them learn to cope with the psychological stress that causes various adverse reactions. Patients meet weekly to learn how to identify the factors that cause bad moods and regulate their emotions. Appropriate medication is also necessary when patients exhibit more severe anxiety, depressed mood, sleep disturbances, impulsive behavior, and psychotic-like symptoms. Other studies have shown the great importance of psychosocial care and reinstatement of employment for patients with borderline personality disorder to resume their social roles.