“Social media and smartphones are causing the teen mental health crisis.”
Moderate confidence that the strong causal claim is not established. A National Academies consensus review found that population-level evidence did not support concluding that social media causes adolescent health changes, while also finding credible individual harms, benefits and vulnerable subgroups. Smartphones and social media are also different exposures.
Population-level evidence has not established that social media and smartphones are causing the teen mental-health crisis. Some patterns of social-media use can harm some teens, but average associations are generally small and cause and effect are difficult to separate. Smartphone ownership is a different exposure.
Teen mental health reflects many interacting influences, including family, school, sleep, discrimination, economic stress, offline relationships and individual vulnerability. Platform design and the content encountered can matter more than screen time alone.
Safety note: Online harassment, harmful content, sleep disruption and compulsive use deserve attention even though the population-wide causal claim remains unsettled.
Talk to a healthcare professional if: Seek help when a teen has persistent low mood, anxiety, self-harm thoughts, major sleep change, withdrawal from normal activities or declining daily function.
Avoid panic and pay attention to the specific teen. Social media can be harmful, helpful or neutral depending on the person, content, design and pattern of use.
Set shared boundaries around sleep, harassment and disruptive use, and ask the teen which online experiences help or hurt rather than relying only on total screen time.