A parent who witnesses their child sleepwalking for the first time tends to describe the same experience: the child is moving, apparently purposeful, sometimes talking, but their eyes are glazed, they do not respond normally, and there is something unmistakeably wrong about the way they seem. It is unsettling to watch. It is not dangerous in itself – but a child who sleepwalks can hurt themselves, and that is what parents need to manage.
Sleepwalking is common enough that most families with children will encounter it, and most cases resolve without intervention. Knowing why it happens and what to do about it removes much of the anxiety.
Healthbooq (healthbooq.com/apps/healthbooq-kids) covers child sleep and common sleep disturbances.
Why Sleepwalking Happens
Sleep is organised into cycles of approximately 90 minutes. Each cycle contains stages of non-rapid eye movement (NREM) sleep, culminating in slow-wave sleep (stages N3), followed by a period of REM sleep. The first third of the night contains the most deep slow-wave sleep; children have proportionally more deep sleep than adults.
Parasomnias are abnormal behaviours that arise during transitions between sleep stages. Sleepwalking, sleep terrors, confusional arousals, and sleep-related eating disorder are all NREM parasomnias arising from the same partial arousal from deep slow-wave sleep. The brain achieves a state somewhere between deep sleep and waking: motor systems activate, but the sleeping person lacks conscious awareness or later memory of the episode.
The genetic contribution is strong. If one parent had sleepwalking as a child, their child's risk is around 45%; if both parents, the risk approaches 60-80% (Lecendreux et al., Molecular Psychiatry, 2003). But genetics is not fate: sleepwalking requires a trigger. Sleep deprivation is the most potent trigger in children – an overtired child has more intense slow-wave sleep rebound, increasing the likelihood of partial arousal. Fever, stress, illness, a disruptive sleep environment, and certain medications (sedating antihistamines, some sleep aids) also trigger or worsen sleepwalking.
What an Episode Looks Like
Episodes typically occur in the first 1-2 hours of sleep. The child may sit up in bed, get out of bed, walk through the house, or in more dramatic cases attempt to leave through a door. They may have eyes open but with a glassy, unfocused appearance. They may utter words or fragments of speech. They may appear distressed or confused. They rarely respond meaningfully to attempts to talk to them.
Most episodes last between 1 and 30 minutes. The child returns to bed (or is guided back) and has no memory of the event in the morning. If awoken during an episode, the child is confused and disorientated for several minutes – which is why waking is not recommended.
Safety
The management priority is making the sleep environment safe. This means stair gates or door alarms for young children, or an alarm on the child's bedroom door if they are older, so that a parent is alerted if the child leaves the room. Windows in the child's bedroom should be locked if they are at a height that could cause a fall. Sharp objects and trip hazards in the path the child might take should be removed. If the child sleepwalks to an external door, consider a bolt placed high up.
Waking the child is not necessary and can be distressing for both child and parent. Gently guiding the child back to bed with a calm, reassuring voice works well without waking them.
Scheduled Awakening
Scheduled awakening – waking the child approximately 15-30 minutes before the time they typically sleepwalk, and keeping them briefly awake before allowing them to go back to sleep – can interrupt the sleep cycle and prevent the episode. This approach, developed by Mark Stores at the University of Oxford and others, has evidence supporting its effectiveness in children with frequent, predictable sleepwalking. The timing relies on the episodes being consistent, which they often are.
When to Seek Help
Most childhood sleepwalking resolves without treatment, typically reducing through adolescence as slow-wave sleep diminishes. Referral or further assessment is appropriate if: episodes are very frequent (multiple per week); episodes are dangerous (the child has fallen or approached external doors); episodes are distressing to the child; there is daytime sleepiness suggesting a primary sleep disorder; or the episodes are atypical in form (prolonged, occur in multiple phases of the night, or involve unusual behaviour).
Obstructive sleep apnoea (OSA) can trigger sleepwalking by causing repeated arousals from deep sleep, and treating the OSA often resolves the sleepwalking. Snoring, pauses in breathing during sleep, and restless sleep alongside sleepwalking should prompt assessment.
Key Takeaways
Sleepwalking is a NREM (non-rapid eye movement) sleep parasomnia affecting around 15-40% of children at some point. It is caused by an incomplete arousal from deep slow-wave sleep during the first third of the night. Children typically have no memory of the episode. Sleepwalking tends to run in families and is more common in children who are sleep-deprived or feverish. The main management priority is safety. Most children outgrow sleepwalking by adolescence as the proportion of slow-wave sleep naturally decreases. Persistent, frequent, or dangerous sleepwalking warrants assessment to exclude an underlying sleep disorder.
