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.
This is one of the most common questions parents ask. Searching for answers means you care.
By Age
What to expect by age
0-3 months
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.
3-6 months
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.
6-12 months
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.
12-24 months
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
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
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.
How Long Should the Bedtime Routine Be?
An ideal bedtime routine for babies and toddlers is 20-30 minutes. Shorter routines may not give enough time to wind down, while routines longer than 45 minutes can become a stalling tactic. Consistency in the routine order matters more than exact length.
Is My Baby's Bedtime Too Early?
For most babies over 3 months, bedtime between 6:00-8:00 PM is appropriate. A bedtime that is too early can cause early morning wakings (before 6 AM) or long periods of wakefulness in the middle of the night. However, during nap transitions or on days when naps were short, an earlier-than-usual bedtime helps prevent overtiredness.
Is My Baby's Bedtime Too Late?
For babies over 3-4 months, consistently going to bed after 8:30-9:00 PM may result in overtiredness, which paradoxically makes it harder to fall asleep and stay asleep. Cortisol rises when babies are overtired, leading to more night wakings and early mornings. Moving bedtime earlier, even by 15-30 minutes, often improves overnight sleep quality.
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.