Non-suicidal self-injury (NSSINSSINSSI) refers to a series of direct and consequently repeated injuries to one's body without suicidal intent. At present, it has become an important issue of mental disorders. This study is expected to complete a multi-center epidemiological survey of non-suicidal self-injury in China, and to study its pathogenesis and intervention methods.

(1) NSSI NSSI epidemiological survey. For example, epidemiological investigation. For example, in the period of 2020.1.1-2020.6.30 half a year, the psychiatric departments of fourteen hospitals of different regions, regions and nature (psychiatric specialist hospitals/general hospitals), hospitals of different types in Jiangsu Province, and hospitals of different types in Jiangsu Province were selected by stratification. In outpatient and inpatient departments, a certain proportion of young people were selected from outpatients and inpatients. Guided by the recommended diagnostic criteria of DSM-5 and guided by semi-structured interviews, the patients with NSSI behavior were screened out by semi-structured interviews. The incidence, comorbidity, incidence, comorbidity and basic psychosocial factors were investigated.(2) Exploring the pathogenesis of NSSI. Exploration of pathogenesis. A case-control study was designed on the basis of flow survey. The NSSI NSSI group and the normal control group were set up. The data of symptomatology, genetic factors of social factors of psychological cognitive function and brain imaging were collected. The data of brain imaging, brain imaging and other data were collected, and the data of social-psychological-biological data collection and mechanism exploration were carried out.(3) Clinical intervention study of NSSI. NSSI patients were randomly divided into structured DBT group intervention group (DBT-ST) and support group discussion group (SGT). The experimental group was given structured DBT group therapy intervention, while the control group was given the same frequency of support group discussion. To explore the therapeutic effect and mechanism of structured DBT group therapy intervention on NSSI behavior. In order to provide a scientific and effective treatment for NSSI behavior.

Inclusion Criteria:

1. 10-40 years old;
2. Voluntary participation, signing informed consent and obtaining the consent of family members of patients under 18 years old;

Exclusion Criteria:

1. history and family of neurological or psychiatric disorders;
2. history of psychiatric disorders and family history;
3. severe somatic diseases;
4. taking psychotropic drugs within three months;
5. pregnancy and lactation