GlossaryBPD: Borderline Personality Disorder is a long-term pattern of abnormal behavior characterized by unstable relationships with other people, unstable sense of self, and unstable emotions. PTSD: Post Traumatic Stress Disorder is a mental disorder that can develop after a person is exposed to a traumatic event, such as sexual assault, warfare, traffic collisions, or other threats on a person''s life. Published on Sep 14, 2017Last Updated on Sep 26, 2017