Ages 14–15
Screen time and online safety for ages 14–15
Teens are forming identity in public. Safety here is less about blocks and more about trust and conversation.
Screen time — what experts recommend
Protect sleep, movement, schoolwork and offline relationships. Choose content and agree manageable boundaries together. A time target alone cannot establish whether use is healthy or harmful.
UK context: Separate family rules from formal guidance. Canada’s linked guideline suggests no more than 2 hours of recreational screen time for ages 5–17; this is not a UK rule or a quota specifically for social media. The UK activity guidance and international sleep advice address other parts of the day.
Total time across phone, tablet, TV, console and computer combined (school work usually excluded).
Evidence and practical considerations
- The 2019 English study examined frequency of social-media use, not a three-hour threshold. Associations with distress and wellbeing varied by sex; sleep, cyberbullying and activity accounted for part of the associations, especially among girls. It did not prove cause.
- Amnesty’s 2023 TikTok investigation concerned test accounts and self-harm-related recommendations. Historical experiments do not establish what every teenager sees today.
- Sexual images, including AI fakes, can be reported through the linked services. Do not copy or forward sexual images of anyone who may be under 18; ask police about existing material.
Sources around the world
- UK Chief Medical Officers’ physical activity guidelines (July 2026)
UK Chief Medical Officers · UK
- 24-Hour Movement Guidelines, ages 5–17
Canadian Society for Exercise Physiology · Canada (international guidance)
- Sleep duration guidance
NHLBI / US National Institutes of Health · USA (international guidance)
Typical digital behaviours
- Posting publicly, building a following
- Private messaging with romantic interests
- Gaming communities (Discord, Twitch)
Risks that actually matter
- Sharing nudes, or being pressured into it
- Sextortion — a stranger poses as a peer, obtains an image, then demands money or more images
- AI deepfake nudes made from ordinary photos taken from social accounts
- Intimate-image abuse: images shared on without consent (a criminal offence in the UK)
- Algorithmic rabbit-holes (extreme diet, self-harm, misogyny, hate)
Settings worth changing tonight
- Two-factor auth on every account
- Review who can DM them on each platform
- Lock down photo-sharing: private accounts, no public face photos
- Discuss ‘nothing leaves the phone you wouldn’t want printed’
How to talk about it
- Make it clear: if a nude is leaked or faked, you will help — no punishment, no phone confiscation
- Explain sextortion calmly: stop replying, don't pay, tell a trusted adult and report. Do not copy or forward sexual images of anyone who may be under 18; you do not need evidence before asking police for help.
- Explain that AI-made fake nudes happen to people who never sent anything — and that reporting works (Report Remove, IWF)
- Talk about consent and screenshots
Red flags worth investigating
- Sudden withdrawal, secrecy, sleep loss
- Mentions of someone older they’ve ‘only met online’
If you want to know more from the experts
Studies, guidance and background reading
Hand-picked from paediatricians, regulators, academic journals and investigative reporting around the world. Open in a new tab.
- StudyRoles of cyberbullying, sleep, and physical activity in social-media and wellbeing associationsThe Lancet Child & Adolescent Health (2019)English longitudinal data, ages 13–16. Exposure was frequency of use, not hours; mediation differed between girls and boys.
- ReportIWF annual report 2023Internet Watch Foundation (2023 report)Reports handled by the organisation are not a population prevalence estimate or a count of all UK cases.
- ArticleReport Remove — get a nude image of yourself taken off the internetInternet Watch Foundation / NSPCCUK service for under-18s; works for real and AI-generated images.
- ReportAI-generated child sexual abuse imagery — update reportInternet Watch Foundation (2024)How ‘nudify’ apps are being used against real children.
- ArticleSextortion: what to do if you or your child is targetedPolice.ukReport without waiting to collect evidence. Do not copy or forward sexual images of anyone who may be under 18.
- ReportDriven into the Darkness: How TikTok's For You feed encourages self-harm and suicidal ideationAmnesty International (2023)Algorithm audit of teen test accounts.
- ArticleHealth Advisory on Social Media Use in AdolescenceAPA (American Psychological Association)
- VideoThe Social DilemmaNetflixDocumentary on persuasive design and teen mental health.
- StudyScreen time and sleep among school-aged children and adolescents: a systematic literature reviewSleep Medicine Reviews (2015)Review of 67 studies; most found associations with shorter or later sleep. Causation was not established and results varied.