Adolescence is a period of development that is vulnerable to the emergence of various psychological problems, one of which is anxiety. This article aims to examine the dynamics of anxiety in adolescents as well as the role of Guidance and Counseling (BK) services in preventive, curative, development, and collaborative efforts in the educational environment. The method used is a literature review by reviewing 18 relevant scientific articles published between 2010–2026, which was obtained through Google Scholar search. The study results show that adolescent anxiety is influenced by internal factors such as self-esteem, body image, personality type, and self-control, as well as external factors such as family support, academic pressure, and social media use. The most consistent and effective interventions in reducing anxiety are the Cognitive Behavioral Therapy (CBT) approach, social skills training, and expressive therapy such as art therapy. BK services have a strategic role in conducting early detection, providing psychoeducation, carrying out individual and group counseling, and collaborating with teachers and parents to create a supportive environment. Thus, the strengthening of the BK program based on scientific evidence becomes an important step in supporting the mental health of adolescents at school.