The distinction between personality disorders, neuroses, psychoses, and, above all, normality is difficult and controversial. Common to all personality disorders are disturbances in emotional experience, perception of reality, self-perception and self-presentation, impulse and self-control, and ego-syntony. They affect all aspects of thinking, experiencing, behavior, and relationships with oneself and others. Since patients with personality disorders rarely seek out a psychotherapist directly, doctors have an important function and responsibility in motivating individuals to undergo appropriate treatment and receive long-term support.