This guide, written for adolescents with borderline personality disorder and their parents, informs the readers about the symptoms, causes, treatment options, and especially the course of treatment of a Dialectical Behavior Therapy for Adolescents (DBT-A). Many examples make the content easy to grasp and detailed descriptions of different self-help exercises that can be done at home. The appendix also provides worksheets and useful contact information. This guide wants to encourage affected teens and their parents to seek help early on, as it has been proven that an early diagnosis and subsequent treatment positively influence the progression of the disorder. Target Group: Adolescents suffering from Borderline Personality Disorder and their families.