Quick Answer: Night terrors are episodes of intense fear, screaming or thrashing that erupt from deep NREM sleep, usually in the first third of the night, with no memory afterward. A Sleep Medicine population study found 10.4% of people have had one, though only 2.7% recently. They peak in young children, are usually outgrown, and the priority during an episode is safety, not waking.
Night terrors (also called sleep terrors) are the most dramatic member of the parasomnia family: a child sits bolt upright screaming, eyes open, heart pounding, inconsolable, and remembers nothing in the morning. They are a disorder of arousal from deep NREM sleep, the same stage that produces sleepwalking, which is why the two often run in the same families and the same kids. Bjorvatn and colleagues' population study in Sleep Medicine (2010) put lifetime prevalence at 10.4% and current prevalence at just 2.7%, the gap that tells you most people outgrow them. The full catalogue of strange-but-normal sleep events lives in our sleep phenomena encyclopedia. Mattress Miracle is a family-owned sleep store in Brantford, Ontario, not a clinic; we publish this because frightened parents ask us about it while shopping for kids' beds, and the frightening part is almost always smaller than it looks at 11 p.m. The medical calls belong to your doctor.
"The night terror conversations I have are with parents who look like they have not slept in a week, and the first thing I tell them is that their child is not in pain and will not remember it. The second thing is practical: if episodes happen most nights around the same time, a calmer, cooler room and an earlier bedtime often shrink them, because an overtired child sleeps deeper, and deeper sleep is where terrors start."
Talia Grose, sleep specialist, Mattress Miracle
In This Guide
Reading Time: 7 minutes
What are night terrors?
A night terror is a partial arousal from slow-wave NREM sleep: the body's alarm systems fire at full strength while the conscious brain stays asleep. The person may scream, sit up, thrash, sweat, breathe hard and look terrified with open eyes, yet they are not awake, not dreaming in the ordinary sense, and not reachable with comfort or reason. Episodes typically last one to ten minutes, happen in the first third of the night when deep sleep is heaviest, and leave no memory. That last detail is the kindest one: the terror is witnessed, not experienced. The person who suffers most in the room is usually the parent or partner watching.
Night terrors vs nightmares: how to tell them apart
Night terrors and nightmares are different events from different halves of the night. A nightmare is a bad dream in REM sleep, concentrated in the early morning hours; the sleeper wakes fully, remembers the story, and can be comforted. A night terror erupts from deep NREM sleep in the first hours after bedtime; the sleeper never truly wakes, cannot be comforted, and remembers nothing. If your child can tell you about the monster, it was a nightmare. If they screamed through it and asked nothing about it at breakfast, it was a terror. Our night terrors vs nightmares guide walks the comparison through in detail.
Why do night terrors happen?
Night terrors happen when something deepens or destabilizes slow-wave sleep. The big drivers: being overtired (the single most common one in children, because recovery sleep runs extra deep), irregular schedules, fever and illness, stress, a full bladder, sleeping in a new environment, and in adults, alcohol, untreated sleep apnea and some medications. Genetics set the stage; terrors and sleepwalking cluster strongly in families. None of these mean anything is wrong psychologically. Night terrors are a maturation and arousal-mechanics story, not a trauma story, and in children they carry no link to emotional problems.
Night terrors in children: the usual story
Night terrors in children peak in the toddler-to-early-school years and fade as deep sleep naturally shrinks with age; most children simply outgrow them. The practical playbook for parents: protect the schedule ruthlessly, since overtiredness is trigger number one; keep bedtime calm and the room cool; and if episodes hit at a predictable time most nights, ask your doctor about scheduled awakenings, rousing the child gently 15 to 30 minutes beforehand for a week or two to interrupt the pattern. During the episode itself, do not wake, restrain or argue; just keep them safe and wait it out. The fundamentals in our baby and child sleep guide cover the schedule side in depth.
Night terrors in adults: when they deserve a closer look
Night terrors in adults are much rarer and always worth understanding rather than ignoring. Adult episodes usually have a findable driver: severe sleep debt, high stress, alcohol close to bedtime, a medication change, or sleep apnea repeatedly yanking the brain out of deep sleep. New-onset terrors in adulthood, episodes that involve leaving the bed, or terrors paired with snoring and daytime exhaustion should go to a doctor, and a sleep study is often the useful next step. The stress-management and wind-down techniques in our Insomnia Help hub pull the same levers that reduce adult episodes.
What to do during a night terror
During a night terror, your job is safety, not rescue. Do not shake, restrain or shout; a person mid-terror can react physically to being grabbed. Guide them back down if they will be guided, move anything they could strike, and wait; episodes end on their own and end faster without interference. Afterward, let them sleep, and do not quiz a child about it in the morning; they remember nothing, and the retelling only frightens them. Keep a simple log of when episodes happen; the time-of-night pattern is exactly what a doctor will ask for, and it is what makes scheduled awakenings possible.
The showroom perspective
Mattress Miracle has fitted beds for Brantford families since 1997, and night terror questions usually arrive with a related decision: the toddler moving to a big-kid bed. Our practical advice mirrors the sleepwalking one: keep the bed low, keep the floor clear, and skip the bunk for any child having episodes. Come by 441 1/2 West Street or call (519) 770-0001; the team is non-commission and has helped set up plenty of parasomnia-proof kids' rooms.
Frequently Asked Questions
Should you wake someone during a night terror?
No. They are in deep sleep and waking them mid-episode is difficult, prolongs the confusion and can provoke a physical reaction. Keep them safe, guide them back to lying down if they allow it, and let the episode end on its own, which it will.
Are night terrors a sign of trauma or a mental health problem?
In children, no; they reflect an immature arousal system plus deep sleep, and research links them to genetics and overtiredness, not psychological problems. In adults, terrors are more often tied to sleep debt, alcohol, medications or sleep apnea than to any psychiatric condition, though a doctor should assess new adult onset.
How common are night terrors?
A Sleep Medicine population study found 10.4% of people have experienced at least one night terror, but only 2.7% had one recently. They are most common in young children and usually disappear on their own as deep sleep declines with age.
What is the difference between a night terror and a nightmare?
Nightmares are bad dreams from REM sleep, late in the night, fully remembered and comfortable to soothe. Night terrors erupt from deep NREM sleep early in the night, cannot be soothed, and leave no memory. The morning-after memory is the cleanest tell.
Can a bad mattress cause night terrors?
Not directly; terrors start in the brain's deep-sleep machinery. Indirectly, anything that fragments or deepens sleep unpredictably, including an uncomfortable, overheating bed, feeds the conditions terrors like. We are careful not to oversell that link: schedule and overtiredness matter far more than the mattress here.
Visit Our Brantford Showroom
Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Moving a little one to their first big bed while the night terrors run their course? Low, stable and safe is the recipe. Come tell us the situation; honest advice, no pressure, from the family that has done this since 1997.
Related Reading
- Night terrors vs nightmares in children and adults
- Sleepwalking: why it happens and how to make it safe
- The sleep phenomena encyclopedia
- The baby and child sleep guide
Sources
- Bjorvatn, B., Grønli, J. and Pallesen, S. (2010). "Prevalence of different parasomnias in the general population." Sleep Medicine, 11(10), 1031-1034. PubMed 21093361
- StatPearls: Night Terrors (Sleep Terrors), NCBI Bookshelf: ncbi.nlm.nih.gov/books/NBK493222