Borderline personality disorder is a serious mental illness that involves difficulties with regulating your emotions, your self image, and your relationships with other people. While the causes are unknown, it appears to result from a combination of genetic factors and early exposure to trauma. Psychotherapy is the first-line treatment for this condition, and dialectical behavioral therapy (DBT) is the best established psychotherapeutic approach. DBT combines individual sessions, group sessions, and homework to teach skills to help you regulate emotions and improve your relationships. These treatments can be highly effective in reducing your symptoms and helping you lead a full and meaningful life. If you are considering DBT, make sure to find a therapist with appropriate training. Here is a useful tool for locating a therapist.