Inclusion Criteria:  1. Between 15 and 80 years old 2. Meet the diagnosis of DSM-5 somatic symptom disorder  Exclusion Criteria:  1. With psychotic symptoms (such as schizophrenia, bipolar disorder with psychotic symptoms) or cognitive impairment 2. Having potentially lethal physical diseases (such as cancer, coronary artery diseases, cerebrovascular diseases; because under this condition, high health anxiety is quite rational. Patients with common physical diseases can still enter this trial) 3. Unable to read or understand the questionnaires