Why does my baby bang their head or rock to fall asleep?
Rhythmic movements like head banging, body rocking and head rolling are common in babies and toddlers as they fall asleep. The American Academy of Sleep Medicine reports that 59% of infants show one of them at nine months, dropping to 33% at 18 months and about 5% by age five. Typical cases rarely cause serious injury. See a doctor if it hurts your child or disrupts their sleep.
What it looks like
The American Academy of Sleep Medicine (AASM) describes three main forms of sleep-related rhythmic movement:
- Body rocking: rocking on hands and knees, or rocking the upper body while sitting. It usually starts around 6 months.
- Head banging: repeated movement of the head into the mattress or crib. It usually starts around 9 months, and the AASM calls it the most disturbing form for parents.
- Head rolling: rolling the head from side to side, usually while lying on the back.
It tends to happen while a child is drowsy, falling asleep, or drifting back to sleep after a waking.
How common it is
| Age | Children with a rhythmic movement (AASM) |
|---|---|
| 9 months | 59% |
| 18 months | 33% |
| 5 years | About 5% |
The AASM says the behavior commonly fades by age two or three.
Rhythmic movement is common and usually harmless. When it comes with a night full of wakings, the wakings are the part Actually Sleeping fixes.
Is it harmful
The AASM says typical cases in infants and toddlers pose little risk of serious injury, although strong movements can make loud noises against the bed or wall. Many children appear to use the rhythm to settle, much as adults might jiggle a foot.
Keeping the crib safe
- Don’t add padding. Crib bumpers are banned in the U.S. and the AAP says no bumper pads in the crib. Keep it bare.
- Check the crib. Tighten bolts and screws, and move the crib a little away from the wall to cut down the noise and the rattling.
- Don’t restrain your child.
When to see a doctor
The AASM says to see a sleep specialist if the movements injure your child or keep them from sleeping well. Talk with your pediatrician too if:
- Your child has bruises, cuts or swelling from it.
- It happens for long stretches during the day, not just around sleep.
- It continues past early childhood or is getting more intense.
- You have any concerns about your child’s development, hearing or vision.
The AASM suggests keeping a two-week sleep diary and recording a video of an episode to show the doctor.
When rocking is part of a bigger sleep problem
If your child rocks or bangs for a few minutes and then sleeps, that is often their way of settling. If it happens at every waking, all night, it is usually one sign of broken sleep rather than the cause: a child who wakes between sleep cycles, cannot get back to sleep easily, and rocks or bangs while they try. Parents often respond by rushing in and picking the child up, which can make the waking itself the habit.
The broken nights are the fixable part, and that is what Actually Sleeping does. Dr. Sam writes a plan for your child, whatever their age, that looks at the schedule and how your child falls asleep at bedtime, inside a bare, safe crib. You get bootcamp-style coaching before the first night and daily 1:1 check-ins. Hear from families in our 129 client video reviews. See also frequent night waking.
If the banging or rocking comes with a night full of wakings, book a free consultation with Actually Sleeping.
Want this fixed for your baby?
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Frequently asked
Is head banging at bedtime a sign of autism?
Rhythmic movements at sleep onset are very common in babies: the AASM reports them in 59% of infants at nine months. If you have any concerns about your child’s development, raise them with your pediatrician, who can look at the whole picture.
Should I put bumpers in the crib so my baby doesn’t get hurt?
No. Crib bumpers are banned in the U.S., and the AAP says no bumper pads in the crib. The AASM says typical head banging rarely causes serious injury. Tighten the crib and move it from the wall instead.
When does head banging stop?
The AASM says rhythmic movements commonly fade by age two or three, and only about 5% of children still have them at age five. See a doctor if it injures your child or disrupts sleep.