Borderline or Borderline Personality Disorder (BPD) is a mental illness characterized by persistent instability in mood, self-image, behavior and interpersonal relationships. People with borderline can often behave very impulsively, have difficulty regulating their emotions and tend to have extremely intense and unstable interpersonal relationships. Symptoms of borderline include severe mood swings, impulsivity, self-injurious behavior, chronic feelings of emptiness, identity insecurity, intense and unstable interpersonal relationships and often a strong sense of abandonment. The symptoms can manifest themselves in different forms and can be different for each person. There are various therapeutic approaches for borderline, which aim to improve emotional regulation and stabilize interpersonal relationships. Therapy can include a combination of psychotherapy, medication and self-help measures.