[Nonsuicidal self-injury in adolescence].

Nonsuicidal self-injury (NSSI) usually starts in adolescence. International studies report prevalence rates between 3 and 37% (for Germany between 15 and 26%) in adolescents. From a neurobiological perspective, there is evidence that primarily the serotonergic system is involved in the origin and maintenance of this behaviour. NSSI is often used by adolescents to influence aversive affective states, but sometimes serves other functions as well, such as self-punishment or anti-dissociation. To date there are many assessment instruments, some of which are available in a German translation. Regarding psychotherapeutic interventions there is evidence for a good efficacy of dialectical behavioral therapy for adolescents (DBT-A). There is little evidence for psychopharmacological interventions in childhood and adolescence; thus treatment should focus on psychotherapeutic interventions.