Mental IllnessA handful of mental illnesses both well-known and lesser-known. View fullsize Anorexia Nervosa View fullsize Narcissistic Personality Disorder View fullsize Derealization / Depersonalization Disorder View fullsize Anti-Social Personality Disorder (Sociopathy) View fullsize Somatic Symptom Disorder View fullsize Depression View fullsize Paranoid Personality Disorder View fullsize Pyromania