Does Screen Time Before Bed Affect Sleep? What the Research Says
Many of us scroll in bed, and many of us suspect it is hurting our sleep. The honest answer is that screens can affect sleep, but not only because of blue light. What you do on the screen often matters as much as the light it gives off.
The light effect
Bright light in the evening, especially blue-rich light, can suppress melatonin, the hormone that helps signal night to your body. Research suggests the effect can be real in controlled settings, though the size of it in everyday life is smaller than often claimed, and night-mode filters appear to help only modestly.
The stimulation effect
Social media, news and messages can keep your mind busy, emotionally charged or anxious. A stressful email or an exciting video can make it harder to wind down, even with a dim screen. Many people also lose track of time and go to bed later than planned.
What to try
- Set a screens-down time 30 to 60 minutes before bed.
- Charge your phone across the room, not by your pillow.
- Dim the lights in the evening as well as your screen.
- Use an actual alarm clock instead of your phone.
- Replace scrolling with reading a paper book, gentle stretching or quiet music.
- If you must use a screen, choose something calm and avoid work and news.
Do not stress about perfection
If you cannot avoid screens completely, reduce them gradually. Worrying about sleep can itself make sleep harder, so aim for small, steady improvements. If you still struggle after several weeks, speak with a doctor.
This article is for general information and is not medical advice. If sleep problems last for weeks, or you feel unusually sleepy during the day, talk with a doctor or a licensed sleep specialist.
