Depressive neurosis is also known as bad mood disorder. It refers to a neurosis characterized by a persistent low mood, often accompanied by anxiety, physical discomfort and sleep disorders. Patients have treatment requirements, but there is no obvious motor inhibition or psychotic symptoms, and their lives are not seriously affected. According to an epidemiological survey of neurosis in 12 regions across the country, the prevalence of this disease is 3.1‰. According to a report from the Department of Psychiatry of West China University of Medical Sciences, patients with depressive neurosis account for 21.2% of psychiatric outpatients and 70.6% of neurosis. A survey report on the outpatient department of a county hospital accounted for 27.8% of neurosis, indicating that the prevalence of this disease is relatively high. It is more common in women.