In this proposed study, the investigators will evaluate the effect of text message intervention on Nonsuicidal self-injury behavior in adolescents. The study will recruit 110 adolescents with Nonsuicidal self-injury behavior in outpatient and ward, then all the participants will be randomized to the intervention group (55 cases) or the control group 55 cases) for an 8-week clinic trial. Clinical efficacy and safety assessment will be done at baseline, the fourth week, and the eighth week. The specific aims are to evaluate the effect of text message intervention on NSSI in adolescents are on 1) Tendency and frequency of Nonsuicidal self-injury behavior; 2) Level of negative emotion such as depression, anxiety, and hopelessness 3) The use of emotion regulation strategies and coping styles. A semi-structured quantitative interview will be conducted among adolescents from the SMS group to get the attitude and experiences feedback about the text message.
In this proposed study, Text messages are used to intervene in the NSSI behavior of adolescents, and the efficacy of this intervention method is evaluated, as well as the internal mechanism of adolescents' NSSI behavior is discussed.