Problematic smartphone use is proposed by some researchers to be a form of psychological or behavioral dependence on cell phones, closely related to other forms of digital media overuse such as social media addiction or internet addiction disorder. Other researchers have stated that terminology relating to behavioral addictions in regards to smartphone use can cause additional problems both in research and stigmatization of users, suggesting the term to evolve to problematic smartphone use. Problematic use can include preoccupation with mobile communication, excessive money or time spent on mobile phones, and use of mobile phones in socially or physically inappropriate situations such as driving an automobile. Increased use can also lead to adverse effects on relationships, mental or physical health, and ensues anxiety if separated from a mobile phone or sufficient signal. Preschool children and young adults are at highest risk for problematic smartphone use.
The use of smartphone significantly increased since the late 2000s. In 2019 conducts, global smartphone users penetrated in 41.5% of total population. Due to prolific technological advance, the smartphone overuse continued to be a major threat in Asian countries such as China, with around 700 million users are registered in 2018. Digital media overuse is tangentially linked to ocular problems, especially in young age. It has been estimated that 49.8% (4.8 billion) of global population with digital media overuse would be affected with myopia by 2050.
According to a review from 2016, problematic use of smartphones can not be categorized as a mental disorder, as it does not fit within a set of well-defined criteria. Internet addiction only remains as a proposed disorder, due to this, there are no agreed upon treatments with further research being needed.
Founded in current research on the adverse consequences of overusing technology, "mobile phone overuse" has been proposed as a subset of forms of "digital addiction", or "digital dependence", reflecting increasing trends of compulsive behaviour amongst users of technological devices.