The article highlights the issue of bullying in an educational institution. The difference between bullying and a quarrel or conflict is revealed. The main manifestations of teenager's bullying in are analyzed, such as mocking, kicking, beating, pushing, cyberbullying, etc. The main causes of bullying in an educational institution are revealed. The psychological consequences of bullying for all participants of bullying were analyzed. These include physical injuries, fears, manifestations of anger, low self-esteem, a sense of one's own inferiority, defenselessness, loss of self-respect, lack of social values, tendency to loneliness, deviant behavior, formation of destructive and antisocial personality traits, deterioration of academic performance, etc. A study of the manifestation of different response styles in a conflict situation among teenagers is presented. It was determined that teenagers are characterized by the use of all five response styles in conflict. But the studied sample is characterized by the predominance of such response styles in conflict situations as Rivalry and Avoidance. Which speaks of the desire or to satisfy one's interests, regardless of the needs and desires of others. Or avoidance of conflict and reluctance to make efforts to realize one's interests. The least developed style of cooperation in a conflict situation, which indicates insufficient skills of mutual satisfaction of the needs of participants in conflict interaction.