Night Terrors vs Nightmares: How to Tell Them Apart

It's 11 p.m. and your child is suddenly screaming. You rush in to find them sitting bolt upright, eyes wide open, heart pounding. But when you reach for them, they don't seem to see you at all. Are they awake? Asleep? Somewhere in between? That confusion, and that helpless feeling in the hallway, is something a lot of parents know well.

Understanding the difference between night terrors and nightmares helps enormously, because these two events look similar from across a dark bedroom but are actually very different in origin, experience, and what your child needs from you.

Night terrors and nightmares are not the same thing. A nightmare is a vivid, frightening dream that happens during REM sleep, usually in the second half of the night. Your child will wake from it, remember it, and likely want comfort. A night terror is a partial arousal from deep non-REM sleep, typically in the first third of the night. Your child appears awake but is not, will not remember it, and often cannot be consoled in the usual way. Knowing which is which changes how you respond.

What Are Night Terrors?

A night terror (sometimes called a sleep terror) is what sleep specialists call a parasomnia, a partial arousal from slow-wave sleep. In that in-between state, the brain is partially active but not conscious. The result is a storm of physical responses: screaming, thrashing, rapid breathing, a racing heart, and eyes that are open but glazed and unseeing.

What makes night terrors so unsettling for parents is the gap between how distressed the child looks and how unreachable they are. You may try to hug them, speak their name, even turn on the light, and they simply don't respond. That is not stubbornness. They are genuinely not awake.

A few key markers of a night terror:

• Happens in the first one to three hours of sleep, during deep non-REM sleep
• Child may scream, thrash, or sit up with eyes wide open
• Child does not respond to your voice or touch in a normal way
• Episode ends on its own, usually within five to fifteen minutes
• Child returns to sleep without fully waking and remembers nothing in the morning

Night terrors are most common in children ages 5 and up through the early school years, though they can appear earlier. They tend to run in families and are often linked to being overtired, sick, or going through a period of disrupted sleep.

What Are Nightmares, and How Are They Different?

A nightmare is a distressing dream. It happens during REM sleep, the lighter, more active stage of sleep that cycles through the night and becomes longer toward morning. Because REM sleep is when dreaming is most vivid, nightmares often feel intensely real.

When a child wakes from a nightmare, the difference from a night terror is usually clear. They are genuinely awake. They recognize you. They can often describe what frightened them, at least in fragments. They want to be held, reassured, and may be reluctant to close their eyes again.

Key markers of a nightmare:

• Happens later in the sleep window, often in the early morning hours
• Child wakes up fully and is aware of their surroundings
• Child recognizes you and can be comforted
• Child may remember the dream and want to talk about it
• Falling back to sleep may take some time and reassurance

Nightmares are a normal part of childhood. As children's imaginations grow and they begin processing the bigger, sometimes scarier parts of the world, their dreaming minds do the same work. More on what's typical at each age in our age-by-age guide to nightmares in children.

Night Terrors vs Nightmares: A Side-by-Side Look

If you are in the thick of it and trying to figure out what just happened, this comparison can help.

• Sleep stage: Night terrors occur in deep non-REM sleep. Nightmares occur in REM sleep.
• Timing: Night terrors happen in the first third of the night. Nightmares happen in the second half.
• Is the child awake? During a night terror, no. During a nightmare, yes.
• Does the child recognize you? Not during a night terror. Yes after a nightmare.
• Can they be comforted? Not easily during a night terror. Yes, with reassurance, after a nightmare.
• Do they remember it? No memory after a night terror. The child often remembers a nightmare.

How to Respond to a Night Terror

The most important thing to know: during a night terror, trying to wake your child fully can actually prolong the episode and leave them disoriented. Your instinct will be to intervene, to hold them close and soothe the fear away. That is a loving instinct, but with night terrors, the gentler move is to step back a little.

Here is what tends to help:

• Stay calm and stay close. You are there if they need you, but let the episode run its course.
• Make sure the environment is safe. Move anything they could knock into or fall on.
• Speak in a low, steady voice. You may not reach them consciously, but a calm presence matters.
• Do not try to restrain them unless there is a safety reason to do so.
• Do not describe the episode to them in detail in the morning. Since they have no memory of it, there is nothing to reassure them about.

If night terrors are happening frequently, are especially intense, or are causing significant disruption to the family, it is worth a conversation with your child's pediatrician. Occasional episodes are common and usually resolve on their own.

How to Respond to a Nightmare

After a nightmare, your child is awake and looking for you to help the world feel safe again. That is exactly the right thing to give them.

Come in calmly, sit close, and let them tell you what they remember if they want to. You do not need to analyze the dream or explain it away. Simply acknowledging it, "That sounds really scary, I'm here," goes a long way. For more on navigating these conversations, our piece on nighttime fears vs nightmares covers how children experience and express fear at night.

After the immediate comfort, a small ritual can help a child settle back into their bedtime routine. Some families find that giving the dream somewhere to "go" is genuinely useful. That is part of the thinking behind the Big Bad Dream Box, a keepsake box and DreamPad that gives kids a gentle, imaginative way to process a scary dream and find their footing again before lights out.

A few things that can support calmer nights over time:

• A consistent, predictable bedtime routine that signals safety and winding down
• Avoiding scary or stimulating content in the hour before bed
• Giving your child words for big feelings during the day, so those feelings have somewhere to go before sleep

When to Talk to a Pediatrician

Both nightmares and night terrors are normal parts of childhood development in many cases. But there are times when checking in with a professional makes sense.

Consider reaching out if:

• Night terrors are happening multiple times a week and are not improving over time
• Your child is exhausted during the day due to disrupted nights
• Nightmares are so frequent and distressing that your child is becoming fearful of going to bed at all
• Episodes involve walking, leaving the room, or anything that raises a safety concern

Your child's doctor is the right first stop. They can help you figure out whether anything specific is contributing and what, if anything, is worth addressing.

Frequently Asked Questions

Can a child have both night terrors and nightmares?

Yes. They are separate sleep events that happen in different stages of sleep, so a child can experience both, sometimes even in the same night. Night terrors tend to happen early in the sleep window during deep sleep, while nightmares tend to arrive in the later, REM-heavy hours closer to morning.

Should I wake my child during a night terror?

Generally, it is better not to try to fully wake them. Night terrors resolve on their own, and waking a child mid-episode can leave them confused, frightened, and harder to settle. Stay nearby, keep the space safe, and let the episode pass. Your calm presence is what matters most.

My child has no memory of screaming last night. Is that normal?

With night terrors, yes, this is completely typical. Because the episode happens during deep non-REM sleep rather than dreaming sleep, the brain does not form a memory of it. Your child is not suppressing the memory or protecting you from something. They genuinely did not experience it the way you witnessed it.

Sources

• Sleep Foundation, "Nightmares in Children"