Screen Time Before Bed: Why Your Child Will Not Sleep

By Dr. Danny O'Rourke, PhD, ABPP, board certified in Behavioral and Cognitive Psychology

If you only change one thing about screens in your house, make it the one that protects sleep. Sleep is where parents notice a difference fastest, and better sleep tends to bring mood, concentration and behavior along with it. Most parents have already tried the blue light filter, because it is the advice everyone gives. It is also the smallest of the three things going on, which is why turning it on so rarely changes much.

The three ways screens cost your child sleep

Light. Screens put out blue spectrum light, which suppresses melatonin, the hormone that tells the body it is time to sleep. This part is real, and it matters more for children than for adults, because evening light suppresses melatonin roughly twice as much in children. So use a filter and turn the brightness down. Just don't expect it to be enough on its own.

Arousal. A competitive match, a cliffhanger, or a group chat with something happening in it all raise alertness at the point in the evening when it needs to be falling. A filter does nothing about that.

Displacement. This is the biggest one. Screens take up time that would otherwise have been sleep. Children put bedtime off to finish the episode or the round, older children stay up in conversations that are still going after the adults are asleep, and a device left in the room overnight wakes them in ways they don't remember in the morning.

There is a fourth thing worth knowing. Falling asleep is a skill, and it is practiced in the quiet gap between lying down and dropping off. A child who is entertained right up to the moment they lose consciousness gets very little of that practice, so when the screen goes, the first nights can be harder rather than easier. That is worth expecting rather than reading as a sign the plan is wrong.

How much sleep your child actually needs

These are the American Academy of Sleep Medicine's recommended ranges, based on a review of hundreds of studies. The screens off column allows the sixty minutes before bed that is generally recommended.

One check you can do tonight is to compare weekend and school day wake times. A child who sleeps two or more hours later on weekends is usually running a sleep debt during the week, and that tells you more than asking whether they feel tired.

The change I'd make first

It works because it is about where things are rather than about willpower. You make one decision in daylight, when the house is calm, and it holds all night without you having to enforce anything at two in the morning. It protects the whole night rather than only the last hour, and when it applies to the adults as well, it stops being a punishment and becomes how your household works.

Making it stick

The specifics of the change matter less than whether it is the same every night, so the work is mostly in setting it up properly rather than in holding the line later.

Pick a start date a few days out rather than starting tonight, and say what is changing in the afternoon rather than at bedtime. Decide together what the last hour actually looks like, write it down, and then keep that order. I am not going to tell you it has to be reading, or a bath, or anything else, because families are different and what settles one child winds another one up. What matters is that your child knows what happens next without having to ask.

Sort the predictable objections before the first night rather than during it. Buy alarm clocks in advance and let your child pick theirs. Agree a message cutoff with an older child, and be willing to be the reason they give their friends. Put your own phone in the kitchen too. And change one thing at a time, not bedtime and gaming and weekend rules all in the same week.

What to expect

Expect the first stretch to be harder than what you had before, and expect at least one night that looks like evidence the whole idea was a mistake. That is the normal shape of any change to a routine, and it is not a verdict on the plan. Give it long enough to see a pattern rather than judging it on a single night, and if it is not settling at all, treat that as information rather than as failure. The next section is what to do with it.

When it isn't the screens

Some sleep problems have nothing to do with screens, and they are worth ruling out rather than pushing harder on a plan that was never going to fix them. Mention it to your pediatrician if your child snores loudly, gasps, or breathes through their mouth all night, if they are exhausted all day despite a full night in bed, if bedtime brings something closer to panic than protest, or if sleep has not improved after a few consistent weeks with the devices out of the room.

This article is for general education only. It is not therapy, not clinical advice, and not a substitute for an assessment of your own child. Nothing here is individualized to your family, and sleep advice in particular needs to fit the child in front of you. You know your child better than any article does, and every decision about your child is yours to make. If you are worried about your child's sleep or wellbeing, please talk to your pediatrician or a qualified mental health professional.