There are many reasons why teenagers are addicted to the Internet. The following are some possible factors: 1. Social needs: Teenagers can make new friends on social media, share their thoughts and experiences, and gain support and encouragement. 2. Virtual sense of achievement: Many online games and virtual worlds can provide players with a virtual sense of achievement. These experiences can replace the sense of achievement and challenges in real life. 3. Escape from reality: Teenagers may choose to seek escape and relaxation on the Internet because of real-life problems or pressures such as academic pressure, family problems, interpersonal relationships, etc. 4. Easy access to information: The Internet provides a fast, extensive and rich source of information so that teenagers can understand the world faster and obtain knowledge to improve their thinking and cognitive level. 5. A lack of social support: Teenagers may be addicted to the Internet because of loneliness or lack of social support. They communicate and interact with others on the Internet to alleviate their loneliness. 6. The temptation of inappropriate content: There is a large amount of inappropriate content on the Internet, such as sex, violence, gambling, etc., which may mislead teenagers 'values and behaviors, causing them to indulge in the Internet. Teenagers 'addiction to the Internet was a complex and multi-factored problem that needed to be understood and solved from multiple perspectives. Parents, teachers, and society should strengthen online education and supervision of teenagers to help them form correct values and behaviors.