Sleep problems in children (by age)

How healthy sleep changes with age

Newborns sleep in short bursts around the clock; over the first year a day–night rhythm develops and night sleep consolidates; naps gradually drop through the toddler and preschool years; and in adolescence the body clock naturally shifts later. Judging whether sleep is a 'problem' always means comparing it with what is normal for that age — which is why it helps to look stage by stage.

Babies (newborn, about 0–3 months)

In the first weeks there is no settled day–night rhythm yet: babies sleep in short stretches and wake often to feed, and 'day–night reversal' is common. This is normal, not a disorder. The priorities are safe sleep — placing the baby on their back, in their own clear sleep space, to reduce the risk of sudden infant death — and gently encouraging day–night differences (light and activity by day, calm and dark at night). Frequent night waking at this age is expected.

Infants (about 3–12 months)

A circadian rhythm emerges and night sleep lengthens, so many infants can sleep for longer stretches. The most common difficulty now is frequent night waking that needs a parent's help to settle — often because the baby has learned to fall asleep only with feeding, rocking or holding (a 'sleep-onset association'). Helping a baby learn to settle in their cot, with consistent, gentle routines, is the usual approach. Separation anxiety around 8–10 months can briefly disrupt sleep.

Toddlers and preschoolers (about 1–5 years, 'play age')

Bedtime resistance and curtain-calls ('one more story', repeated getting up) are typical, and respond best to calm, consistent limits and a predictable wind-down routine. Bedtime fears and nightmares appear, and the parasomnias — night terrors and sleepwalking — often begin: dramatic but usually harmless events from deep sleep that children do not remember and generally outgrow. Naps gradually reduce and then stop during this period.

School-age children and adolescents

In school-age children, parasomnias (sleepwalking, night terrors) are at their most common, and insufficient sleep, anxiety, snoring and restless legs can all interfere. Snoring with pauses or restless, sweaty sleep raises the possibility of obstructive sleep apnoea (often from large tonsils and adenoids), which is treatable. In adolescents, the body clock shifts later (delayed sleep phase), so teenagers naturally fall asleep and wake later; combined with early school starts, screens and caffeine, this commonly produces chronic sleep deprivation and daytime sleepiness, with effects on mood, attention and learning.

Common sleep disorders to recognise

• Behavioural insomnia of childhood — sleep-association type (needs help to fall asleep) and limit-setting type (bedtime resistance)
• Parasomnias — night terrors, sleepwalking and nightmares
• Obstructive sleep apnoea — snoring, pauses, restless sleep, mouth-breathing; daytime effects
• Restless legs syndrome / periodic limb movements — often linked to low iron stores
• Delayed sleep phase — the late body clock of adolescence
• Sleep difficulties in neurodevelopmental conditions (autism, ADHD, cerebral palsy), which are especially common

Diagnosis

Most sleep problems are diagnosed from a careful history and a sleep diary, supported by simple screening questions and an examination (including looking at tonsils and growth). A home video of any unusual night-time events is very helpful. A sleep study (polysomnography) is reserved for specific situations — suspected obstructive sleep apnoea, possible narcolepsy, or events that are hard to classify — and a blood test for iron stores (ferritin) is checked when restless legs are suspected.

Treatment

Behavioural approaches and good sleep habits are the foundation at every age and are often as effective as any medicine: consistent sleep and wake times, a calming routine, a dark and comfortable room, limiting screens and caffeine, and age-appropriate handling of night waking and bedtime resistance. Specific causes have specific treatments — for example treating obstructive sleep apnoea (sometimes by removing tonsils and adenoids), correcting low iron for restless legs, and adjusting the body clock in adolescents. Melatonin can help with falling asleep, particularly in neurodevelopmental conditions, when behavioural measures are not enough. Parasomnias usually need only reassurance and safety measures, as children outgrow them.

How an educational review can help

An educational review can help you judge whether your child's sleep is within the normal range for their age, identify likely causes, and set out the behavioural steps and any further assessment that fit — so you can prepare questions for your treating team. It is educational and does not replace your clinician's care.