Sleep Fears and Nightmares in Children: Normal or a Problem?

What's the difference between a nightmare and night terror? Why does your child cry or scream at night? A practical parent guide to children's sleep fears.

Reviewed by: Whispie Editorial Team Evidence-Based Parenting Research

Published: 2026-04-01

This article is for general information and is not a substitute for professional medical advice. Always consult your pediatrician or doctor about your child.

Sources: WHO, CDC, AAP and NHS guidance. Recommendations differ between countries — for local advice see the NHS or CDC.

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Nightmare vs. Night Terror: Key Differences

These two sleep disturbances arise through different mechanisms — and the parent's response should differ accordingly:

Nightmare: Occurs during REM sleep, typically in the second half of the night. The child wakes up, knows where they are, recognizes you, and can describe the bad dream. Accepts comfort.
Night terror (sleep terror): Occurs during deep NREM sleep, typically 1–3 hours after falling asleep. The child opens their eyes, screams, sweats — but is actually still asleep. Does not recognize you, won't accept comfort. Remembers nothing in the morning.

Both can be linked to anxiety in children, but night terrors are more often associated with neurological maturation and typically resolve on their own by ages 6–12.

Free tool: Developmental Milestone Checklist by Age (CDC): 2 Months to 5 Years

Why Do Nightmares Increase?

Daytime anxiety: Unprocessed stress and worry carry over into sleep. Nightmare frequency often rises during periods of intense school anxiety.
Scary content: Age-inappropriate films, games, or stories provide raw material for bad dreams.
Irregular sleep: Inconsistent bedtimes and insufficient sleep both increase nightmare frequency.
Stressful life events: Moving, divorce, illness, loss — nightmare frequency often spikes temporarily afterward.

What to Do After a Nightmare

Go to them and stay calm: Your physical presence is the most powerful reassurance. Don't panic.
Help them orient: "That was a dream — it wasn't real. You're safe now." — short, clear, repeated calmly.
Don't force talking: Asking the next day gives the child the chance to share when they feel ready.
Daytime processing: Drawing the dream or "rewriting" it — adding a good ending — helps children work through fear.
If fear of the dark accompanies it: A nightlight and leaving the door slightly open can make the sleep environment feel safer.

What to Do During a Night Terror

Don't try to wake them: Waking a child during a night terror disorientation and can prolong the episode.
Ensure safety: Prevent falls or self-injury, but don't intervene otherwise.
Wait it out: Episodes typically end within 5–15 minutes. The child falls back to sleep and remembers nothing in the morning.
Track triggers: Does it happen at a specific time? After fatigue or stress? This information is useful for the pediatrician.

When Should You Be Concerned?

Nightmares more than 3 times a week, night terrors persisting past age 12, nightmares that re-enact a traumatic event (possible PTSD indicator), or sleep refusal all warrant professional evaluation. See our guide on when to seek professional support.