Why Won't My Child Fall Asleep? Six Common Causes

The most common reasons a young child cannot fall asleep are an overtired state from a bedtime set too late, screens within the last hour, an inconsistent routine, separation anxiety, a room that is too warm or too light, and having nothing to do while lying still. Bedtime being too late is the most frequently missed of these.

1. Bedtime is too late

Counterintuitive, and the most commonly missed cause. Past a certain point, an overtired child produces cortisol, which makes them wired rather than sleepy. The child who is bouncing off the walls at 8:30 is often past their window, not short of tiredness.

Test it by moving bedtime fifteen minutes earlier every few nights for a week or two. Many families find the child falls asleep faster at 7:00 than they did at 8:00.

2. Screens in the last hour

Screen light suppresses melatonin and the content itself is stimulating. The last hour before bed is the one that matters.

This is usually the easiest single change with the biggest measurable effect. Swap the tablet for books, drawing, or a puzzle — anything absorbing and dull-lit.

3. The routine changes nightly

A routine works as a signal, and a signal only functions if it repeats. If the order changes, the length varies, or the ending is negotiable, the body has nothing to learn.

Four to six steps, same order, same finish, every night. Predictability is doing the work — not the specific activities.

4. It's separation, not sleep

Requests for water, one more story, another cuddle are usually about the adult leaving rather than the thing being requested.

Two fixes: give ten genuinely unhurried minutes early in the routine so connection is met before lights out, and make your return predictable — “I'll check on you in five minutes,” then actually do it. A child confident you'll return stops working to keep you there.

5. The room

• Too warm. Around 18°C suits most children. Overheating is a very common and easily missed cause.
• Too light. Especially in summer. Blackout blinds help more than people expect.
• Too quiet. A silent room makes every household noise a jolt. Low white noise smooths it.
• Too interesting. A bed surrounded by visible toys is a bed in a playroom.

6. Nothing to do while lying still

“Go to sleep” isn't an instruction anyone can follow. For a child prone to worry, lying in the dark with an unoccupied mind is exactly when anxieties surface.

Give them a task. A body scan from toes upward, slow breathing counted on fingers, or naming things from the day. It should be slow, repetitive and mildly boring. Most children don't finish.

This is why Good Sleep pairs a bedtime checklist with a gentle touch meditation — it gives a child something to do rather than an instruction to comply with.

When to raise it with a doctor

Speak to your GP or health visitor if your child snores loudly or seems to stop breathing briefly during sleep, if sleep problems persist for months despite consistent routines, if daytime behaviour or concentration is significantly affected, or if bedtime anxiety appears severe rather than habitual. Sleep apnoea in children is treatable and frequently missed.

Common questions