Internet addiction is a serious problem especially for children and adolescents. It is described by an individual's inability to control the Internet, which causes distress and functional impairment. Internet addiction symptoms can be Internet surfing, computer gaming, chatting and gambling by using Internet. Previous studies regarding Internet addiction can interfere with some psychiatric disorders; such as bipolar disorder, depression, anxiety or attention deficiency disorder (ADHD). Some researchers emphasized that psychiatric disorders and Internet addiction can be seen together and excessive use of the Internet has been associated with attention deficit hyperactivity disorder.

19 years old male patient discussed in this paper who was admitted to our psychiatric service for the first time in his life, complaining about uncontrollable use of internet. He spent time more than 10hours/day. His family finally opposed and took his computer from him, just before he got depressive symptoms. We diagnosed him ADHD by using psychometric tests and psychiatric evaluations. After medical therapy and psychotherapy, we discussed changes his psychiatric situations and symptoms.

This case emphasized possible relationship between Internet addiction and symptoms of ADHD.