Digital isolation represents a contemporary paradox in which increased connectivity through social media and digital technologies does not necessarily translate into improved social integration or psychological well-being. This review synthesizes current evidence on the relationship between digital environments and mental health, with a focus on mechanisms underlying loneliness, anxiety, depression, and related outcomes. The findings indicate that problematic and passive use of social media—particularly when associated with social comparison processes and Fear of Missing Out (FoMO)—is consistently linked to increased levels of depressive symptoms, anxiety, sleep disturbances, and reduced well-being. At the same time, the evidence highlights substantial heterogeneity, suggesting that the impact of digital technologies is moderated by user characteristics, age, patterns of engagement, and psychosocial context. Importantly, digital technologies may also serve compensatory and protective functions by facilitating social support, especially in conditions of objective isolation. Key mediating mechanisms include cyberbullying, social exclusion, emotional contagion, and internalization of body image standards. The concept of “digital loneliness” emerges as a useful framework for understanding the discrepancy between constant connectivity and perceived relational insufficiency. Practical implications emphasize the need for targeted interventions focusing on digital literacy, healthy usage patterns, and psychosocial support rather than simplistic reduction in screen time. Overall, digital isolation should be conceptualized as a qualitative dysfunction of mediated social interaction rather than a purely quantitative effect of technology exposure.
Grajek et al. (Mon,) studied this question.