摘要:Adolescence is a period of important mental and organic transformations, and one strategy due experiencing negative emotions, is to self-harm. Objective of this study was to investigate the presence of self-injurious behaviors in adolescents, and association between anxiety symptomatology, depression and adolescents' perception of their relationship with parents. This work is part of a larger project called Health Behavior in School-Aged Children (HBSC). Proposed scope is to investigate adolescents of the Northern Region of Brazil (Amazon). Instruments used were Children Depression Inventory (CDI), Children Spence Anxiety Scale (SCAS), and HBSC Questionnaire. Sample consisted of 507 students from Rondônia, aged 13 to 15 years. Data analysis was performed through means of comparison of mean, percentage (t-test and chi-square) and analysis of variances. Results indicate that young people who self-harm have higher rates of depression and anxiety and that lacking perception of family support correlates directly with self-harm behavior. A better understanding of mental and emotional health in adolescence will provide adolescents with greater support for their internal conflicts.