Night Terrors vs Nightmares in Children: How to Tell Them Apart

Your child sits bolt upright at midnight, screaming, eyes open, not responding to you. Is it a nightmare or a night terror? They look alike in the moment but they come from different stages of sleep, and the right response to one is close to the wrong response to the other.

Nightmares

Nightmares happen during REM sleep, the dreaming stage that becomes longer and more intense in the second half of the night. So nightmares tend to strike in the early hours of the morning rather than soon after bedtime.

During a nightmare your child is genuinely asleep, but when they wake they wake fully. They are frightened, alert, and know who you are. Younger children may not be able to separate the dream from reality straight away. They can usually tell you something about what happened, and they often do not want to go back to sleep, or not in their own room.

Occasional nightmares are a normal part of development, most common between ages 3 and 6 as imagination expands and children become aware of things that can go wrong. They tend to increase during stressful periods, after scary media, when overtired, or during illness.

What helps with nightmares

• Go to your child, turn on a soft light, and offer calm physical reassurance. Keep it low-key and confident rather than alarmed.
• Acknowledge the fear without over-discussing the content at 3am. A short "that was a scary dream, you are safe, I am here" is enough.
• Settle them back in their own bed where possible, staying until they are calm. Repeatedly moving into your bed after nightmares can turn an occasional event into a nightly pattern.
• In the daytime, address triggers: cut back on frightening films, books and games, especially in the two hours before bed; protect sleep so your child is not overtired; and give an anxious child a calm way to talk about worries earlier in the evening.
• For a recurring nightmare in an older child, "rescripting" can help: during the day, have them draw or tell the dream and then invent a different, better ending they rehearse before bed.

Night terrors (sleep terrors)

Night terrors are a parasomnia: an event that arises when a child gets partway out of deep non-REM sleep but not fully awake. Deep sleep is concentrated in the first third of the night, so terrors typically happen 1 to 3 hours after your child falls asleep, often around the same time each night.

During a terror your child may sit up, scream, cry, thrash, kick, sweat, breathe fast and have a racing heartbeat, with eyes wide open. It looks as though they are awake and in danger. They are not. They cannot see you properly, do not respond to comforting, may push you away or become more agitated if you try to restrain them, and have no memory of the episode the next morning. Most terrors last a few minutes, occasionally up to 20 or 30, and then the child lies down and sleeps normally.

Night terrors are most common between ages 3 and 8 and usually fade by adolescence. They often run in families alongside sleepwalking and sleep talking, which belong to the same group of deep-sleep parasomnias.

What helps with night terrors

• Do not try to wake your child. Waking them mid-terror tends to prolong the confusion and distress. Stay nearby, keep the lights low, and speak little.
• Keep them safe. Guide them gently back to bed if they get up, move anything they could hurt themselves on, and make sure stair gates and window locks are in place if sleepwalking is also happening.
• Wait it out and do not discuss it in the morning. There is nothing to process because your child has no memory of it. Talking about it can create anxiety about going to sleep.
• Reduce the triggers. Terrors are strongly linked to not getting enough sleep, an irregular schedule, sudden schedule changes, illness and fever, a full bladder, stress, and noise or disturbance during deep sleep. An earlier, more consistent bedtime is often the single most effective change.
• Consider scheduled awakenings. If terrors happen at a predictable time, gently rouse your child just enough to stir them about 15 to 30 minutes before that time, then let them resettle. Doing this for a week or two can interrupt the cycle. Ask your doctor if you want to try this.

When to speak to a doctor

Most nightmares and night terrors need patience rather than treatment. Book an appointment with your GP, health visitor or a paediatrician if:

• Terrors happen most nights, several times a night, or continue well into the school years or teens.
• Episodes involve leaving the house, going near stairs or windows, or behaviour that could cause injury.
• Your child snores loudly, gasps, mouth-breathes, or seems to stop breathing during sleep. Sleep-disordered breathing is a common, treatable trigger for parasomnias.
• Your child is very sleepy or struggling in the daytime despite enough time in bed.
• Nightmares are frequent, intense, and clearly tied to a specific frightening experience, trauma, or ongoing anxiety.