Personality disorders are some of the most misunderstood and stigmatized mental illnesses. It’s no wonder, then, that there’s so much confusion about what they are and how to treat them. But there’s good news: you don’t have to be a therapist or mental health professional to understand what personality disorders are and how they can impact your life (and the lives of those around you). We’ve put together this guide so that you can learn more about the causes, symptoms, treatment options, and prognosis for each type of personality disorder—and have fun while doing it!