It’s not actually the phones - teen screen time may not be the mental health villain we think, a study suggests

A long-term study of 25,000 teens challenges the idea that social media and gaming cause anxiety and low mood.

Teenage girl sitting by window holding smartphone in hand.

Published: January 19, 2026 at 1:16 PM

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For years, many parents have been warned that too much time on TikTok, Instagram, or gaming consoles is harming teenagers’ mental health.

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From headlines linking smartphones to anxiety, to calls for social media bans for under 16s, the message has often felt clear: screens are the problem.

But a major new UK study suggests the picture is far more complicated, and for parents trying to do the right thing, that nuance really matters.

Researchers who followed more than 25,000 young people across Greater Manchester found little evidence that time spent on social media or gaming actually causes mental health problems during early to mid-adolescence.

Instead, the findings suggest that screen use and wellbeing are linked in more subtle ways, and that focusing solely on hours spent online may be missing the bigger picture.

What the study looked at

The research was carried out using data from the #BeeWell programme, an annual survey that tracks young people’s wellbeing over time.

Rather than taking a one-off snapshot, researchers followed the same pupils over three school years, from year eight through to year ten, when children were aged between 12 and 15.

This long-term, or longitudinal, approach allowed the team to see how changes in digital habits related to changes in mental health over time, rather than simply comparing different groups of children at one moment.

Crucially, the analysis focused on what happened within individual teenagers. The researchers looked at whether a young person’s mental health worsened after they increased their time on social media or gaming, compared with their own usual behaviour.

What they found about social media and gaming

When researchers applied this more rigorous method, the assumed link between screen time and later mental health problems largely disappeared.

For both boys and girls, spending more time on social media or gaming did not predict a later increase in so-called internalising symptoms, such as worry, anxiety, or low mood.

The team also explored a popular theory among parents and experts, that how teenagers use social media matters more than how long they spend on it. Active use, like posting, commenting or messaging friends, is often thought to be healthier than passive scrolling.

However, even when the researchers separated these behaviours, neither type was linked to worsening mental health over time.

Differences between boys and girls

While screen time itself did not appear to cause mental health difficulties, the study did uncover some interesting gender differences in how teenagers’ digital lives evolve.

Girls who spent more time gaming in one year tended to spend less time on social media the following year, suggesting that gaming and social platforms may compete for the same limited free time, rather than combining to create additional pressure.

For boys, the pattern was different. Those who reported higher levels of low mood or worry in one year were more likely to reduce how often they gamed the next year. Researchers suggest this could reflect anhedonia, a loss of interest in activities that were once enjoyable, which is a common feature of depression — or they were self-moderating their screen time and replacing it with things that would make them feel better.

Why the fear around screens is so strong

If the evidence linking screens to poor mental health is weak, why does the concern feel so overwhelming for families?

One reason is that many earlier studies relied on simple correlations. Teenagers who are anxious or depressed often do use social media more, but that does not mean social media caused the problem.

It may be that struggling young people turn to their phones for distraction or connection, or that another factor, such as school pressure, bullying or family stress, is influencing both mental health and screen habits.

By using a large and diverse sample, and accounting for factors like socio-economic background and special educational needs, this study aimed to get closer to what is really going on in teenagers’ lives.

What this means for parents

The findings do not suggest that the digital world is risk-free. Issues such as cyberbullying, sleep disruption and exposure to harmful content remain very real concerns, and need careful attention from parents, schools and platforms.

The study also looked at year-on-year trends, so it cannot rule out short-term effects, such as how a child feels immediately after spending time online.

However, the research does suggest that blanket limits on screen time, or broad policies like banning social media for under 16s, are unlikely to improve teenagers’ mental health in the long term on their own.

For parents, this may be a reminder to look beyond the screen. If a teenager is struggling, technology use is rarely the only factor at play. Supporting mental health often means paying attention to sleep, friendships, school pressures and what is happening at home, rather than assuming that phones and games are the root cause.

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Moving away from a simple digital harm narrative may help families focus on what children really need to feel supported, understood and well.

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MadeForMums

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