Should you look at your phone when you can't sleep?

What a screen does at night

Light in the evening and at night tells your body clock that it is still daytime. A 2015 study in PNAS by Chang and colleagues compared reading on a light-emitting tablet with reading a printed book in the hours before bed over several nights. After tablet reading, participants took longer to fall asleep, had a later release of the sleep-related hormone melatonin, and felt less alert the next morning.

Light is only half of it. A phone is designed to hold your attention. News, messages and social feeds hand your brain fresh material to think about, often with an emotional charge. At 2 AM, one message from work can undo half an hour of winding down.

The checking habit

Many people check the time on their phone when they wake up. That one glance often turns into a look at notifications, then a quick read, then twenty minutes gone. Even just seeing the time can start a calculation of how many hours are left, which builds pressure.

Moving the phone out of reach, or at least face down with notifications silenced, breaks that chain. If you need an alarm, a simple alarm clock turned to face the wall does the job without the temptation.

The habit also changes how bed feels. When a phone is part of every wake-up, the brain learns that waking at night is a time for checking. A few weeks of keeping it out of reach can quietly undo that link.

If you do use your phone at night

There are good reasons to keep a phone nearby: an alarm, a family member who may need you, or a calming routine you rely on. In that case, set it up before bed so night use is as gentle as possible.

1. Turn brightness all the way down and use a dark or night mode.
2. Silence notifications except for genuine emergencies.
3. Decide on one task in advance, such as a breathing exercise or a calm audio track, and open nothing else.
4. Avoid browsers, news and social apps completely after lights out.
5. Put the phone down as soon as the task ends.

Choosing a silent cue you can feel, rather than a talking track or a bright display, also keeps you from disturbing a partner. Our guide to silent haptic breathing explains the idea.

Better alternatives in the dark

Most of what people want from a phone at night, a distraction from thoughts, can be done without one. Slow breathing such as the physiological sigh, a body scan or calm imagery like the cognitive shuffle all work with your eyes closed.

If you are wide awake and frustrated, getting up for a short while in dim light is usually better than scrolling in bed. Our guide on what to do when you can't sleep lays out the steps.