Abstract. This article, entitled "Adverse effects of computer games on the psyche and health of adolescents", explores the complex and multifaceted effects of computer games on the lives of adolescents. The article deeply analyzes the psychological, social and physical negative consequences of this cultural phenomenon, which is widespread among teenagers in modern society. The study examines the effects of computer games on the psyche of adolescents, including psychological conditions such as aggression, anxiety, depression and gaming addiction, as well as social consequences such as social withdrawal and academic decline. It aims to provide parents and careers with practical advice on how to manage teenagers' playtime and how to protect their health.