My Baby Cries in Their Sleep Without Waking Up
The short answer
Babies commonly cry, whimper, moan, or fuss during sleep without fully waking, and this is usually completely normal. Babies spend more time in active (REM) sleep than adults, and during these phases they may make sounds, move their limbs, grimace, or cry briefly before settling back into deeper sleep. Intervening too quickly can actually wake a baby who would have settled on their own. Wait a moment to see if they resettle before picking them up.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
0-3 months
Newborns spend up to 50% of their sleep in active REM sleep, during which they may twitch, smile, frown, suck, and cry without being awake. These sleep sounds and movements are a normal part of brain development. Before rushing to pick up your baby when you hear them cry in their sleep, pause for 30-60 seconds to see if they settle. Many parents discover that their baby was never truly awake. However, if the crying escalates and your baby opens their eyes and appears distressed, they may need feeding, a diaper change, or comfort.
3-12 months
Sleep crying continues to be common in this age range, particularly during sleep transitions between cycles. Many babies cry briefly between sleep cycles (every 45-60 minutes) as they partially wake before entering the next cycle. This is a normal part of learning to connect sleep cycles. If you wait a few minutes, many babies will resettle themselves. Teething, illness, and developmental leaps can temporarily increase nighttime fussiness and sleep crying.
12-36 months
Toddlers may cry, talk, or even scream during sleep. This can be related to dreams, night terrors (confusional arousals), or processing the day's events. Night terrors, which are different from nightmares, typically involve screaming or crying while still asleep and the child does not remember the episode. They are most common between 18 months and 6 years. During a night terror, the best approach is to ensure your child is safe but not try to wake them, as this can prolong the episode.
What Should You Do?
When to take action
- Your baby whimpers, moans, or cries briefly during sleep but settles within a few minutes without intervention.
- Your baby makes active sleep sounds - grunting, sighing, squeaking - while their eyes remain closed.
- Your baby cries between sleep cycles but goes back to sleep on their own.
- These episodes are brief (a few seconds to a few minutes) and do not happen continuously throughout the night.
- Your baby cries extensively during sleep most nights and seems exhausted during the day.
- Sleep crying is accompanied by unusual movements such as body stiffening, rhythmic jerking, or breath-holding.
- Your toddler has frequent, intense night terror episodes that are disruptive to the family.
- Your baby has episodes of rigid body posturing, rhythmic jerking, or color changes during sleep crying - these could indicate seizure activity.
- Your baby is making choking or gasping sounds during sleep.
- Your baby stops breathing for more than 20 seconds during sleep or has pauses in breathing that are accompanied by color change.
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Sleep Concerns
My Baby Screams in Their Sleep
Babies commonly cry out, scream, or shriek during sleep without fully waking. This usually happens during transitions between sleep cycles or during active REM sleep, when the brain is highly active. It sounds alarming, but in most cases your baby is not in distress and will settle back into deeper sleep within seconds to minutes.
Toddler Night Terrors
Night terrors are a common and harmless sleep phenomenon where your child appears terrified - screaming, thrashing, or sitting up - but is actually still asleep and will not remember the episode. They are caused by a partial arousal from deep sleep and are not a sign of emotional distress or psychological problems.
My Baby Wakes Up Confused and Crying
Confusional arousals happen when your baby partially wakes during a transition between sleep stages but isn't fully conscious. They may cry, seem upset, push you away, or not recognize you for several minutes before either fully waking or returning to sleep. This is a type of parasomnia that's developmentally normal and not harmful.
My Baby Only Naps for 20 Minutes
Short naps (20-45 minutes) are extremely common in babies under 5-6 months and are usually a normal part of sleep maturation. A single sleep cycle for a baby is about 20-45 minutes, and younger babies have not yet learned to link sleep cycles together. Most babies naturally consolidate naps and begin sleeping longer stretches by 5-6 months of age. Short naps do not necessarily mean your baby is not getting enough sleep overall.
How Long Should Baby Be Awake Between Naps?
The ideal awake time between naps (called a "wake window") increases as your baby grows. Newborns may only handle 45-90 minutes awake, while toddlers can manage 4-6 hours. Getting wake windows right is one of the most effective ways to improve nap quality, because both too-short and too-long wake times lead to poor sleep.
Is a Bath Before Bed Really Necessary?
A nightly bath is not medically necessary and some babies with sensitive skin do better with less frequent bathing. However, a warm bath can be a powerful sleep cue because the subsequent body temperature drop triggers melatonin production. If you include a bath, keep it calm and warm rather than stimulating.