Why Your Child Won't Sleep (And What Actually Helps)

By Emma Williams — mum to Leo (now seven), who has waged a long and creative war against bedtime

You know the scene. It's 8:45pm. You've done the bath. The pyjamas are on. You've read the book — yes, the one they chose, the one you've read so many times you could recite it in your sleep. And now they're standing at the bottom of the stairs saying, with absolute seriousness, "Mummy, I think my legs need a glass of water."

If you've ever sat on the landing, staring at the ceiling, wondering why your perfectly healthy child seems physically incapable of sleeping — welcome. You are in the enormous, exhausted majority. And I'm here to tell you that most of what's happening is completely normal, a lot of it is fixable, and some of it you can just… let go.

Because here's the truth nobody puts on a parenting Instagram page: sleep problems don't end when the baby days end. They just change shape.

Age-Appropriate Sleep: What's Actually Normal

The first thing that changed everything for us was understanding what sleep looks like at different ages. I'd been treating Leo's sleep like it should follow a single curve — more sleep when he's small, less when he's older, neat and tidy. It doesn't work like that. Children's sleep needs shift dramatically, and the problems shift with them.

Toddlers (1–3 Years)

Toddlers typically need 11–14 hours of sleep in a 24-hour period, including one nap. The nap is key — drop it too early and you get a tiny, wired human who melts down by 4pm. Most children stop napping between ages 3 and 5, but there's no rush. If your toddler still naps at 3½, that's fine. If they dropped it at 2½, that's also fine.

The big toddler sleep battles are usually about separation. They don't want you to leave. They're not being manipulative — their brains are going through a developmental leap where they understand you can leave, but they haven't yet figured out that you're coming back. That's genuinely distressing for a small person.

What helped us: a very brief, very consistent goodbye ritual. Two books, a song, a kiss on the forehead, and the same words every night — "I'll be just downstairs, you're safe, see you in the morning." Not a negotiation. Not a debate. Just the script, repeated calmly, every single night.

School-Age Children (5–12 Years)

School-age kids need 9–12 hours. This is where a lot of parents get blindsided because the overtiredness changes. A tired toddler screams and falls asleep on the living room floor. A tired 8-year-old is wired, hyperactive, and argumentative — then lies in bed staring at the ceiling asking increasingly existential questions about whether dinosaurs had dreams.

The common culprits at this age are worry and overstimulation. School brings homework pressure, friendship drama, and for the first time, genuine anxiety about things beyond their control. And screens — but we'll get to those in a minute.

What helped us: the "worry dump." Every night before bed, Leo tells me one thing he's worried about and one thing he's happy about. It takes two minutes. It gives me a window into what's going on in his head, and it means those worries aren't swimming around when he's trying to fall asleep. If the worry is something big — a friend falling out, a test tomorrow — we talk about it properly. If it's small, we just acknowledge it. Either way, it gets out.

Teenagers (13–18 Years)

Teens need 8–10 hours, but here's the cruel twist: their circadian rhythm genuinely shifts during puberty. A teenager's body clock naturally wants to fall asleep later — around 11pm — and wake up later. This isn't laziness. It's biology. It's why forcing a 14-year-old to get up at 6:30am is as productive as trying to make a cat take a bath.

The problems at this age are usually a perfect storm of biological shift, social pressure, academic stress, and the fact that their phone is essentially welded to their hand. Teenagers who say they "can't sleep" often mean they can't stop scrolling long enough to feel sleepy. But it's also true that their bodies genuinely need a later bedtime than school allows, and that mismatch causes real, chronic sleep deprivation.

What helped us: compromise. Leo's now old enough to manage his own bedtime on weekends, and I let him. On school nights, screens go off at 9:30pm — not because I'm a tyrant, but because the research on blue light and melatonin is overwhelming. The compromise part is that he can read, listen to music, or chat — he just can't be staring at a screen.

Bedtime Resistance: The Art of the Stall

You know the repertoire. The water. The toilet. The "I forgot to tell you something." The sudden, urgent need for a specific stuffed animal that is not in the room. The "can you check under my bed for spiders?" request that somehow needs to be fulfilled five times.

Here's what I've learned: bedtime resistance is almost never about the child not being tired. It's about one of these things:

• Separation anxiety. They don't want the day (or you) to end. This peaks around ages 2–4 and can reappear during stressful periods at any age.
• Loss of control. Bedtime is one of the few things in a child's life that is imposed on them. The stalling is their attempt to exert some autonomy.
• Overstimulation. If the hour before bed involves running, playing, arguing, or exciting TV, their brains are firing on all cylinders. They're not tired because you've accidentally woken them up.
• Worry. Often the most overlooked reason. A child who is genuinely anxious about something will find every excuse to avoid being alone in the dark.

The approach that works best for most of these is boringly simple: be consistent and don't engage with the stalling. Acknowledge their request calmly — "I know you want water, you've had your water" — and redirect back to bed. Every time you give in to the fifth trip for water, you're teaching them that the twenty-seventh trip will work too.

It took us about two weeks of absolute consistency before Leo stopped testing the boundaries. Those two weeks were brutal. But the other side is glorious.

Night Terrors vs Nightmares: What's the Difference?

This one confuses a lot of parents, and rightly so — from the outside, they look terrifying. But they're very different things happening at very different points in the sleep cycle.

Nightmares happen during REM sleep (usually the second half of the night). Your child will wake up, recognise you, remember the bad dream, and want comfort. This is normal brain development — their imaginations are firing, and sometimes the stories their minds produce are genuinely scary. Comfort works here. A cuddle, a reassurance, and they can usually get back to sleep.

Night terrors happen during deep sleep (usually the first third of the night). Your child might sit up, scream, thrash, or even walk around — but they are not awake. Their eyes might be open but they're not seeing you. They won't remember it in the morning. This is the terrifying one to witness, but the truth is: night terrors are not dangerous. Your child is not in distress (even though they sound like they are), and trying to wake them up usually makes it worse and lasts longer.

What to do during a night terror: stay nearby, keep them safe, don't try to wake them, and let it pass. It usually lasts 5–20 minutes. The worst thing you can do is panic — and believe me, the first time it happens, you will panic. Knowing what to expect helps enormously.

Night terrors are common between ages 2 and 8, and they're linked to being overtired, unwell, or having a disrupted sleep schedule. If your child is getting them frequently, look at the basics first: enough sleep, consistent bedtime, no screens in the hour before bed.

Screen Time and Sleep: The Honest Truth

I'm not going to lecture you about screens. If you're reading this on a screen, that would be a bit rich. But I am going to tell you what the research actually says, because it's more nuanced than "screens bad."

Blue light from screens suppresses melatonin — the hormone that tells your brain it's time to sleep. This is well-established. The effect is strongest in the 1–2 hours before bedtime. So a child watching YouTube at 8pm when bedtime is 8:30pm is basically giving their brain a "stay awake" signal right when they need the opposite.

But it's not just the light. The content matters too. Fast-paced, exciting, or scary content activates the brain in ways that a book doesn't. A child reading a story in bed can gradually wind down. A child watching TikTok is getting a new stimulus every 15 seconds. Their brain has no chance to transition into sleep mode.

What actually works:

• Screen-free zone from one hour before bedtime. This is the single biggest change that made a difference for us. Non-negotiable, and it applies to parents too — the hypocrisy is real if you're scrolling while telling your child to put the iPad down.
• Bright screens in the morning are fine. Morning light exposure actually helps set the body clock. So the iPad at breakfast isn't the same problem as the iPad at bedtime.
• Night mode isn't a magic fix. Warm screen filters reduce blue light but don't address the stimulation problem. A child watching cartoons on night mode is still watching cartoons.

The Power of a Consistent Routine

I know, I know — you've heard this a thousand times. But I'm going to tell you why it works, because understanding the reason makes it easier to actually do it.

Children's brains crave predictability. When the same thing happens in the same order every night, the brain starts producing sleep hormones in anticipation. Bath → pyjamas → book → song → bed becomes a chemical sequence, not just a behavioural one. Your child's body starts getting sleepy at the bath stage because it knows what's coming.

When you skip steps, change the order, or introduce something new right before bed, you're breaking that chemical chain. The child isn't being difficult — their brain just hasn't been given the signal that sleep is imminent.

Here's the other thing about routines: they need to be short. A bedtime routine that takes 45 minutes isn't a routine — it's an event. Ours takes about 20 minutes: pyjamas, teeth, one book, one song, lights out. That's it. The shorter it is, the more likely you'll actually stick to it every night, especially on the evenings when you're knackered or it's been a long day.

Related reading: The Perfect Bedtime Routine — a detailed guide to building one that actually lasts.

When to Worry (And When to Just Breathe)

This is the bit I wish someone had given me when Leo was little. There's a huge spectrum between "totally normal" and "needs medical attention," and most sleep problems sit firmly in the normal range. But some don't. Here's a rough guide.

Probably normal — take a breath:

• Occasional resistance at bedtime (most kids go through phases)
• Waking up once during the night and needing a brief comfort
• Nightmares, especially after scary films or stressful events
• Regression during illness, teething, or big life changes (new school, new baby, house move)
• Wanting a light on, or the door open
• Taking a while to fall asleep — up to 30 minutes is normal for many children

Worth talking to your GP about:

• Chronic snoring or gasping during sleep. This can indicate enlarged tonsils or adenoids, or in some cases, sleep apnoea. Children with sleep apnoea often don't sleep well despite looking like they're "out cold," and it can affect their behaviour, concentration, and growth.
• Night terrors that happen multiple times a week and are getting worse despite good sleep hygiene. Rarely, frequent night terrors can be a sign of underlying sleep disorders.
• Extreme difficulty falling asleep — taking hours, every night, consistently. This can sometimes point to anxiety, ADHD, or restless legs syndrome.
• Excessive daytime sleepiness despite adequate nighttime sleep. If your child is falling asleep at school or can't stay awake, something may be interfering with their sleep quality.
• Sudden changes in sleep patterns that come with other symptoms — mood changes, loss of appetite, withdrawal from friends.

When to seek help urgently:

• Your child is consistently getting far less sleep than is normal for their age (e.g., a toddler sleeping 8 hours total, or a school-age child sleeping 5–6 hours).
• Sleep problems are causing significant distress — yours or theirs.
• You suspect anxiety, depression, or another mental health concern is driving the sleep problem.

The thing I've learned is that most sleep problems are temporary and situational. Your child isn't broken. Their sleep isn't "wrong." They're just going through a developmental stage, processing something, or going through a phase. Give it two weeks of consistent routine and most things improve. If they don't, then it's time to ask for help — and asking for help is not a failure. It's being a good parent.

The Part I Wish I'd Known Earlier

Here's what I want to leave you with, because I know you're tired and I know you're probably reading this at 10pm on your phone after the child has finally, finally gone to sleep.

You are not doing it wrong. The fact that you're reading an article about your child's sleep means you care deeply, and that care is more important than any specific technique or routine. The perfect bedtime routine doesn't exist. What exists is a routine that's consistent enough, kind enough, and sustainable enough that you can actually do it every night.

Leo still has the occasional bad night. He still comes into our room sometimes at 2am, wild-eyed from a nightmare, and climbs into bed between us. And you know what? Those nights are annoying and exhausting, but they're also temporary. He won't need me to chase away bad dreams forever. There will come a day when he handles it all on his own, and I'll probably miss it.

So tonight, if bedtime was a battle — you survived it. Tomorrow, try the same thing again. Consistency isn't glamorous. It isn't Instagram-worthy. But it works. And that's enough.

You've got this. Even when it doesn't feel like it. 🌙

— Emma

Related reading: New Parent Sleep Survival Guide · Sleep Hygiene Checklist · How Many Hours of Sleep Do I Need?