The diagnosis of somatic symptom disorder is established when three criteria are met: distressing and impairing somatic symptoms are present; the symptoms are persistent (i.e., >6 months); and the symptoms are associated with abnormal and excessive thoughts, feelings, and behaviors, typically manifested by disproportionate catastrophizing, high levels of anxiety, and illness behavior. For example, following an uncomplicated myocardial infarction, a man is advised to resume normal activities, but he worries constantly about a recurrence and experiences dizziness, dyspnea, and palpitations unrelated to exertion, he restricts his activities, and he checks his pulse hourly. Note that the diagnosis of somatic symptom disorder in this case is based on criteria that are present rather than lack of explanation of symptoms; furthermore, these criteria focus on territory familiar to psychiatrists and psychologists—thoughts, feelings, and behaviors. The removal of the emphasis on medically unexplained symptoms allows a focus on patient suffering without questioning its legitimacy or “reality.” Furthermore, finding somatic symptoms of unclear etiology is not sufficient to make this diagnosis. In the absence of abnormal thoughts, feelings, and behaviors, patients with irritable bowel syndrome, chronic fatigue, or fibromyalgia would not qualify for a diagnosis of somatic symptom disorder.