What Causes Night Terrors In Children? 8 Things Parents Should Understand
Night terrors in children are caused by an immature nervous system, deep slow-wave sleep disruptions, overtiredness, fever, stress, and genetic factors. They typically affect children ages 3 to 12, last 5 to 45 minutes, and are not remembered by the child the next morning. They are frightening to witness but rarely harmful.
If your child has ever screamed, thrashed, or stared blankly in the middle of the night without waking up, you have probably witnessed a night terror. They are more common than most parents realize, and they are very different from a bad dream.
This guide covers what causes night terrors in children, how to recognize them, and what you can do as a parent.
What Is a Night Terror?
A night terror (also called a sleep terror) is a partial arousal from deep, non-REM sleep. The child’s brain moves between sleep stages but does not complete the transition. The result is a child who appears awake but is still mostly asleep.
During a night terror, children may:
- Scream, cry, or shout
- Sit up or stand in bed
- Stare with wide, glassy eyes
- Thrash or flail their arms and legs
- Appear terrified or confused
- Be difficult or impossible to comfort
The episode typically ends on its own. The child returns to calm sleep without fully waking. In the morning, they usually have no memory of what happened.
Night terrors are classified under a group of sleep disturbances called parasomnias, which also includes sleepwalking and sleep talking.
Night Terrors vs. Nightmares: Key Differences
Parents often confuse night terrors with nightmares. They are not the same thing.
Nightmares happen during REM sleep, usually in the second half of the night. The child wakes up, remembers the dream, and can often describe it. They may need comfort but can be consoled.
Night terrors happen during deep NREM sleep, usually in the first third of the night. The child does not fully wake up, cannot be consoled during the episode, and has no memory of it afterward.
| Night Terror | Nightmare | |
|---|---|---|
| Sleep stage | Deep NREM (slow-wave) | REM sleep |
| Time of night | First 1 to 3 hours | Later in the night |
| Child’s awareness | Not awake | Fully awake |
| Memory after | None | Often vivid |
| Response to comfort | Difficult to console | Responds to reassurance |
Understanding this difference helps parents respond appropriately and avoid making the episode worse.
8 Things Parents Should Understand About Night Terrors
1. An Immature Nervous System Is the Root Cause
The most fundamental cause of night terrors is a brain that is still developing. Young children have not yet established smooth transitions between sleep stages.
The American Academy of Pediatrics notes that as the nervous system matures, these transitions improve. Most children outgrow night terrors completely by adolescence.
This is why night terrors are so much more common in children than adults.
2. Overtiredness and Irregular Sleep Schedules Are Major Triggers
A child who is not getting enough sleep is far more likely to experience a night terror. Overtiredness increases the pressure for deep slow-wave sleep, which makes partial arousals more likely.
Common overtiredness triggers include:
- Skipping naps in toddlers who still need them
- Late bedtimes during holidays or travel
- School schedule changes or early morning wake times
- A sudden reduction in total sleep time
Keeping a consistent bedtime and age-appropriate sleep schedule is one of the most effective ways to reduce night terror frequency.
3. Fever and Illness Can Trigger Episodes
When a child is sick, their sleep architecture changes. Fever in particular disrupts the normal progression through sleep stages, which can trigger a night terror.
If your child has a fever and experiences a night terror, it is not a cause for alarm on its own. Focus on managing the illness and keeping their sleep environment comfortable. If you are unsure whether a fever warrants a visit, the pediatric urgent care team at Just 4 Kids is available for same-day evaluations.
4. Stress and Anxiety Can Play a Role
Children process emotions during sleep. When a child is going through something stressful, that emotional load can disrupt sleep transitions and increase the likelihood of a night terror.
Life events that commonly correlate with night terrors include:
- Starting a new school or daycare
- A move to a new home
- A new sibling
- Family conflict or tension
- Academic pressure in older children
If night terrors begin after a notable life change, the stress connection is likely worth exploring. The mental health services at Just 4 Kids can help if your child is struggling with anxiety or emotional stress that affects their sleep.
5. Genetics Play a Significant Role
Night terrors run in families. Research published in Sleep Medicine Reviews suggests a strong heritable component to parasomnias, including night terrors.
If one or both parents experienced night terrors or sleepwalking as children, their child is significantly more likely to do the same. This is not something parents caused, and it is not something to feel guilty about.
6. Certain Medications and Substances Can Be a Factor
Some medications affect sleep architecture in ways that can trigger night terrors. These include certain antihistamines, stimulant medications, and some asthma drugs.
If night terrors started around the same time as a new medication, bring that observation to your child’s pediatrician. Never adjust or stop a prescribed medication without medical guidance.
7. Sleep-Disordered Breathing Is a Recognized Trigger
Obstructive sleep apnea and other forms of sleep-disordered breathing can increase night terror frequency. When breathing is interrupted during sleep, the brain is forced to partially rouse. That partial arousal can trigger an episode.
Signs of sleep-disordered breathing include:
- Loud snoring most nights
- Mouth breathing during sleep
- Observed pauses in breathing
- Restless sleep or unusual sleep positions
- Daytime sleepiness despite adequate sleep time
If your child snores frequently or shows other signs of disrupted breathing, bring it up at your next well-child visit so it can be properly evaluated.
8. Night Terrors Are Not a Sign of Psychological Disorder
This is one of the most important things parents need to hear. A child having night terrors is not mentally ill, emotionally damaged, or experiencing trauma (unless there is a separate, unrelated issue to address).
Night terrors are a developmental phenomenon. Most children who experience them have no underlying psychological condition. They simply have brains that are still learning how to sleep.
Reassure yourself and your child. This is common, this is manageable, and for the vast majority of children, this ends on its own.
How to Respond During a Night Terror
Knowing what to do in the moment makes a difficult experience much easier to handle.
Do:
- Stay nearby to keep your child safe
- Speak in a calm, low voice
- Wait for the episode to pass on its own
- Guide your child gently back to lying down if they have stood up
- Make sure the sleep environment is safe (no sharp corners, stairs nearby, or ways to exit the house)
Do not:
- Try to wake your child fully
- Hold them down or restrain them forcefully
- Shout at them or try to snap them out of it
- Turn on bright lights
- Talk about it in detail the next morning if they have no memory of it
Trying to force a child awake during a night terror often prolongs the episode and increases distress.
When to Talk to Your Child’s Pediatrician
Most night terrors do not require medical intervention. However, you should schedule a visit if:
- Episodes occur more than once per week consistently
- Night terrors begin after age 12 for the first time
- The child injures themselves during an episode
- Sleepwalking is also occurring
- You suspect sleep apnea or breathing issues
- Daytime behavior or school performance is affected
- You are concerned about your child’s mental health or stress levels
The pediatric team at Just 4 Kids can help determine whether further evaluation is needed and guide you on management strategies.
Frequently Asked Questions
At what age do night terrors start and stop?
Night terrors most commonly begin between ages 3 and 5, though they can occur in toddlers as young as 18 months. Most children outgrow them by early adolescence. It is uncommon for night terrors to persist into adulthood.
Can I prevent night terrors?
You cannot prevent every episode, but you can reduce their frequency. Consistent sleep schedules, age-appropriate sleep duration, managing stress, and treating any underlying sleep-disordered breathing are the most effective strategies.
Is my child in pain during a night terror?
No. Although the episode looks distressing, the child is not in pain and is not consciously experiencing fear. They are in a state between sleep and waking, and they typically have no memory of it afterward.
Should I wake my child during a night terror?
Generally, no. Attempting to fully wake a child during a night terror often extends the episode. It is better to keep them safe and let the episode resolve naturally.
Are night terrors the same as seizures?
Night terrors and nocturnal seizures can look similar, but they are different. Seizures typically involve rhythmic motor movements and last a shorter time. If you are unsure whether your child is having seizures, contact your pediatrician promptly for evaluation.
How is a night terror different from sleepwalking?
Both are NREM parasomnias, and they can occur in the same child. Night terrors involve intense fear and vocalization. Sleepwalking involves complex motor activity with less emotional distress. Some children experience both.
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified pediatric healthcare provider for diagnosis, guidance, and treatment recommendations specific to your child’s situation.