This document is a compilation of various studies and articles that examine the prevalence of bullying and its impact on the mental health of adolescents in different countries. The research explores factors such as gender, disability, childhood trauma, and family dynamics that contribute to bullying and its consequences. It also discusses interventions and prevention strategies, as well as the role of schools and peers in addressing bullying. The studies highlight the serious and long-term effects of bullying, including depression, suicidal thoughts, self-harm, loneliness, social anxiety, and low self-esteem. The document emphasizes the need for further research on less explored topics such as suicide attempts, early victimization, post-traumatic stress disorder, and suicidality.