My Baby Twitches in Their Sleep
The short answer
Twitching, jerking, and sudden movements during sleep are completely normal in babies, especially newborns. These movements occur during active (REM) sleep and are actually a sign that your baby's nervous system is developing properly. Most babies outgrow frequent twitching by 3-6 months as their sleep cycles mature.
By Age
What to expect by age
Newborns spend about 50% of their sleep time in active (REM) sleep, during which you'll see lots of twitching, jerking, smiling, frowning, and eye movements under closed lids. This is completely normal and is how your baby's brain processes experiences and builds neural connections. You may also see the startle (Moro) reflex, where your baby suddenly throws their arms out. This reflex is normal until about 3-6 months and can wake your baby, which is why swaddling often helps.
As your baby's nervous system matures, you'll notice less frequent and less dramatic twitching. The percentage of active sleep decreases and deep sleep increases, so movements become less common. The Moro reflex typically disappears by 5-6 months. Occasional twitches, especially of the hands, feet, or face, remain normal. If your baby seems to be having rhythmic jerking that doesn't stop when you gently touch them, or if twitching occurs while awake, mention it to your doctor.
Older babies still have occasional twitches during sleep, but they should be brief and irregular. Your baby may jerk awake occasionally or move their hands and feet, especially during dreams. Some babies this age grind their teeth or talk/babble in their sleep as their language skills develop. If you notice new onset of repetitive, rhythmic jerking, stiffening, or movements that seem different from typical sleep twitches, contact your pediatrician.
Toddlers may have occasional hypnic jerks (the sensation of falling) when falling asleep, just like adults. They may also move around frequently, talk, or even sit up briefly during sleep. This is normal. However, if your toddler has repetitive movements, seems to "zone out" or stare blankly while awake, or has concerning behaviors during sleep like stiffening or rhythmic movements, these should be evaluated.
What Should You Do?
When to take action
- Twitching occurs during sleep, is brief and irregular, and stops when your baby wakes up
- Your baby has jerky movements of arms, legs, face, or eyes during active sleep
- The Moro (startle) reflex causes sudden arm movements in babies under 6 months
- Twitching decreases as your baby gets older and sleep cycles mature
- Your baby is developing normally, eating well, and meeting milestones
- Twitching movements are rhythmic, repetitive, or always involve the same body part
- Movements don't stop when you gently touch or hold the affected limb
- Twitching occurs while your baby is awake, especially if they seem unaware of it
- You notice eye movements side-to-side or staring spells while awake
- Your baby seems excessively tired, irritable, or is regressing in developmental skills
- Your baby has a seizure lasting more than 5 minutes or multiple seizures in a row
- Twitching is accompanied by difficulty breathing, blue or grey lips, or unresponsiveness
- Your baby has rhythmic jerking along with fever, vomiting, or signs of serious illness
- Your baby is limp, extremely lethargic, or very difficult to wake
Sources
Related Resources
Related Sleep Concerns
Baby Only Napping 30 Minutes
Short naps of 30-45 minutes are extremely common in babies under 6 months. Your baby is waking at the end of a single sleep cycle and has not yet learned to link cycles together during the day. This is developmentally normal and typically improves on its own between 5-7 months as the brain matures.
Baby Fighting Sleep
A baby who fights sleep is usually either overtired, undertired, or going through a developmental leap. It can feel exhausting, but it is very common and does not mean anything is wrong. Adjusting wake windows and creating a calming pre-sleep routine are the most effective strategies.
My Baby Grinds Teeth While Sleeping
Teeth grinding (bruxism) is surprisingly common in babies and toddlers, affecting up to 30% of children. It often begins when babies first get teeth and may continue through early childhood. While the sound can be unsettling, occasional grinding is usually harmless and most children outgrow it by age 6. It may be related to teething discomfort, jaw development, or simply exploring their new teeth.
My Baby Moans in Their Sleep
Moaning, groaning, and grunting during sleep are extremely common in babies and are almost always harmless. Babies spend a large proportion of their sleep in active (REM) sleep, during which they naturally vocalize, twitch, and make facial expressions. These sounds typically decrease as your baby's nervous system matures over the first few months.
My Baby Naps Too Much
How much daytime sleep is "too much" depends heavily on your baby's age. Newborns naturally nap frequently and for long stretches, while older babies and toddlers gradually consolidate daytime sleep into fewer, shorter naps. Excessive daytime napping becomes a concern mainly if it consistently interferes with nighttime sleep or if it signals an underlying issue like illness.
Baby Needs Rocking to Sleep
Rocking your baby to sleep is a perfectly natural and loving way to help them drift off. It is not a bad habit - it is responsive parenting. If rocking is working for your family, there is no need to change anything. If you would like your baby to learn to fall asleep with less help, gentle, gradual approaches work best.