Internet addiction is being considered as a diagnosis for inclusion in the DSM-V. It involves compulsive online computer use and consists of three subtypes: excessive gaming, sexual preoccupations, and excessive email/texting. South Korea considers internet addiction a major public health issue, with over 200,000 children requiring treatment and 1.2 million children at risk. China also recognizes internet addiction as a problem, with around 10 million teenagers meeting diagnostic criteria.