This article addresses common psychopathological self-injurious behaviors in adolescents. This article utilizes a cognitive behavioral theoretical approach which includes functional analysis. The proposed objective is to analyze pathologies associated with self-injurious behaviors and relevant descriptive and explanatory variables. This study looks at personal history information, stable personality characteristics, and the consequences associated with self-injurious behavior, which includes self-harm without suicide. It also specifies key mechanisms of self-injurious behavior, such as negative self-concept and self-esteem, forms taken by self-harm and its intentionality. Finally, this article utilizes a case study of a teenager with borderline personality disorder to exemplify outlined self-injurious behaviors and traits addressed in the article.