Nightmares & Disorders
Nightmares in children: what to do at three in the morning
The single most useful thing to establish is what time it happened, because that distinguishes two entirely different phenomena requiring opposite responses.
Both are common, both are frightening for parents, and they are routinely confused. The distinction is straightforward once known and it determines what you should do.
Nightmares
When: second half of the night, when REM periods are long.
What happens: the child wakes fully, frightened, and seeks comfort. They are oriented, they recognise you, and they can describe what happened — often in detail.
Memory: retained, sometimes for years.
What to do: comfort, reassure, stay until settled. Ordinary parenting works.
Nightmares peak between roughly three and six years, coinciding with the development of narrative dreaming and with the age at which children have limited grasp of the distinction between dreams and reality — that understanding develops gradually and is not secure until around seven.
Sleep terrors
When: first third of the night, typically within one to three hours of falling asleep, arising from deep slow-wave sleep.
What happens: the child may sit up or leap out of bed, scream, appear terrified, with eyes open, racing heart, sweating and flushing. They do not respond to you, do not recognise you, and cannot be consoled. Attempts to hold or wake them frequently make it worse. It lasts a few minutes to half an hour and then they lie down and sleep.
Memory: none. In the morning the child is fine and has no idea anything happened. The parent has been awake since two.
What to do: do not wake them. Keep them safe — clear obstacles, guide them gently if they are moving — and wait. Speak calmly if it helps you. Do not restrain unless necessary for safety.
Every instinct says to wake a terrified child. With sleep terrors this is the wrong move: waking from deep sleep produces confusion and often prolongs the episode. The child is not experiencing fear as you understand it — this is an arousal disorder, not a bad dream, and there is no frightening content to be rescued from. They will not remember it. You will.
What triggers terrors
Anything that increases slow-wave sleep pressure or fragments deep sleep.
Sleep deprivation is the strongest and most actionable. An overtired child has deeper slow-wave sleep and more terrors. Counter-intuitively, the treatment for a child having frequent night terrors is usually more sleep, including an earlier bedtime.
Irregular schedule, travel, and time zone changes.
Fever and illness.
A full bladder.
Noise or disturbance during the early part of the night.
Sleep apnoea. Important and under-recognised. Enlarged tonsils and adenoids fragment deep sleep, and frequent terrors in a child who also snores, mouth-breathes or has restless sleep warrant assessment. Treating the apnoea frequently resolves the terrors.
Scheduled awakening
Where terrors happen at a fairly predictable time, this is the intervention with the best evidence and it is simple.
For a week, note the time of the episodes. Then, for the next one to two weeks, gently rouse the child fifteen to thirty minutes before the usual time — enough to produce a brief arousal, not full wakefulness — then let them settle.
The mechanism is thought to be interruption of the slow-wave cycle at the point where the incomplete arousal would otherwise occur. Small trials and clinical experience support it, and it typically works within a couple of weeks.
Managing nightmares
For ordinary developmental nightmares, comfort is usually sufficient and they resolve with age.
Where they are frequent or distressing, the same approach that works in adults works in children, adapted:
Talk about it in daylight, not at three in the morning.
Rescript it. Have the child draw the dream and then change it — give the monster a silly hat, make the pursuer trip over, put a door in the wall. Imagery rehearsal therapy works in children and is more engaging in drawn form.
Give them agency. A torch by the bed. A "monster spray". Permission to come and get you. The specific device matters less than the child having something they can do.
Check the input. Frightening content before bed — screens, stories, news overheard from another room — is a common and easily removed contributor.
Protect sleep. Overtired children have more of both nightmares and terrors.
When to seek help
Most of this is normal and outgrown. Reasons to see a doctor:
Episodes involving snoring, gasping or witnessed pauses in breathing — assess for apnoea.
Stereotyped, repetitive movements, or episodes that look identical each time, particularly with tongue biting or incontinence — nocturnal seizures need excluding.
Episodes starting suddenly in an older child who did not previously have them, or persisting well into adolescence.
Nightmares following a traumatic event, or accompanied by daytime anxiety, regression or behaviour change.
Injury during episodes.
And, worth saying: significant parental exhaustion is itself a reason to ask for help. A family losing sleep for months has a problem worth addressing even where the child is fine by morning.
