The aim of this research was to examine the psychology-related factors of internet addiction by using the keywords "internet", "addiction", "internet addiction", "psychology". The study brought together the findings of other studies in the literature on the concept of internet addiction and presented them to the reader in the form of a literature review. It has been mentioned that especially with the Covid-19 pandemic, online activities have increased and individuals in the society have been psychologically affected by this situation. Internet addiction studies have taken place in a dimension where they can be studied jointly with psychology, clinical psychology, psychiatry and other disciplines. The fact that the subject was addressed with a multidisciplinary approach was intended to create a comprehensive and informative content. The method of the research was based on the databases of YÖK National Thesis Center, Google Scholar, ProQuest, ResearchGate between 1999 and 2021 regarding internet addiction and psychology in Turkey and the World, with the keywords "addiction", "internet addiction", "internet", "psychology". A total of 40 articles, books, master's and doctoral theses were found by searching, and 34 articles, books and master's thesis materials were selected for the sample of the research.  The result of the research is that the number of Internet and social media users is increasing day by day, and they are progressing online in every aspect of their lives, and users may develop internet addiction.