Screen time after a concussion: what the 2021 trial found
Updated 2026-11-02
Quick answerIn a 2021 randomized trial of 125 people aged 12 to 25 with concussion, those allowed screens in the first 48 hours recovered more slowly: median 8 days versus 3.5 days without screens. The authors suggest limiting screens during acute recovery. When you return to screens, dim them and take breaks.
Trial details
- Emergency department patients aged 12 to 25, within 24 hours of concussion.
- Screen-permitted group: median 630 minutes of screen time in 48 hours; abstinent group: 130 minutes.
- Median recovery 8.0 vs 3.5 days (P = .03).
Returning to screens
- Start with short sessions and regular breaks.
- Dim the screen and use dark mode.
- Turn off autoplay and animations.
When to get help
- See a doctor urgently for a sudden severe headache, new weakness, trouble speaking, loss of vision or confusion (NHS).
FAQ
How long should I avoid screens after a concussion?
The trial tested the first 48 hours; follow your doctor's advice.
Does this apply to migraine?
No. The trial studied concussion, not migraine.
Sources
- Macnow T et al. Effect of screen time on recovery from concussion: a randomized clinical trial. JAMA Pediatrics, 2021. Link
- Talens-Estarelles C et al. The effects of breaks on digital eye strain, dry eye and binocular vision: testing the 20-20-20 rule. Cont Lens Anterior Eye, 2023. Link
- NHS. Headaches: when and where to get medical help. Link
Not a medical device and not medical advice. Migraine Mode is a screen-comfort tool: it does not diagnose, treat, cure or prevent migraine or any other condition, and it does not replace a doctor. Its settings are based on studies of light, colour, flicker, patterns and motion; the extension itself has not been clinically tested. When to see a doctor.