A child crying out in the night can mean very different things depending on what is actually happening beneath the surface, and telling nightmares and night terrors apart helps parents respond in the way that genuinely helps most.
Two Different Events Entirely
Nightmares are vivid, frightening dreams that occur during REM sleep, typically later in the night, and a child usually wakes fully, remembers the dream clearly and seeks comfort. Night terrors, by contrast, arise from deep non-REM sleep earlier in the night, involve intense fear, crying or thrashing while the child remains largely unaware of their surroundings, and the episode leaves the child's memory blank the next morning.
How Common Each One Really Is
A pilot study of 900 elementary school children found that 22% experienced nightmares while 6% experienced night terrors, with both showing higher rates among younger children in the sample. Night terrors peak in prevalence around 18 months, when more than a third of toddlers experience them according to longitudinal research, before gradually declining through the preschool and early school years and becoming distinctly less common after age ten. Nightmares follow a somewhat different pattern, with a 2024 systematic review finding prevalence actually peaks later, among children aged 10 to 14, before decreasing with age.
Responding to Each One Well
- For a nightmare, comfort your child directly, since they are awake and aware, and a brief conversation about the dream can genuinely ease their distress
- For a night terror, avoid trying to wake your child fully, since this often intensifies the confusion, and instead stay nearby to ensure safety until the episode passes on its own, typically within a few minutes
- Keep a consistent, calming bedtime routine for both, since overtiredness and irregular sleep schedules are known triggers for night terrors specifically
- Track frequency and timing, since this information helps a pediatrician assess whether either pattern needs closer attention
When to Bring in a Pediatrician
Both nightmares and night terrors are considered a normal, self limiting part of childhood development in the vast majority of cases and typically resolve as a child grows older. Episodes that occur very frequently, involve genuine safety risks like sleepwalking into hazards, or persist well past the typical age range are worth discussing with a pediatrician, since an underlying sleep disorder or significant daytime stress occasionally plays a role.
The takeaway: Nightmares and night terrors look similar from the doorway but come from different sleep stages entirely, and recognizing which one you are seeing helps you offer your child exactly the kind of response, comfort or calm patience, that actually helps.