The main feature of somatoform disorders is the patient’s repeated statements of somatic complaints and constant requests for medical examinations, which are not dispelled by the negative results of various tests or by the doctor’s repeated assurances that there is no somatic basis for the symptoms. The onset of symptoms was closely related to the persistence of unpleasant life events, difficulties, or conflicts, and the patient often refused to explore the psychological causes. Patients believe that their illness is somatic and request further testing, which can lead to problems in the doctor-patient relationship as the results are often disappointing. The main components of this disorder are somatization disorder, undifferentiated somatoform disorder, hypochondriasis, and somatoform phychiatric disorder. It meets the diagnostic criteria of neurosis; (2) predominantly somatic symptoms, with at least 1 of the following: (i) excessive worry about somatic symptoms (the severity of which is clearly disproportionate to the actual situation), but not delusions; (ii) excessive concern about physical health, such as excessive concern about commonly occurring physiological phenomena and abnormal sensations, but not delusions; (3) repeated visits to the doctor or requests for medical examinations, but negative test results and reasonable explanations from the doctor that neither can dispel his or her doubts. [Severity Criteria] Impaired social functioning. Duration of the disease] At least 3 months have elapsed since the symptomatic criteria were met. [Exclusion Criteria] Other neurotic disorders (e.g., anxiety, panic disorder, or obsessive-compulsive disorder), depression, schizophrenia, and paranoid psychosis are excluded.