Is Your Child Grinding Their Teeth at Night?

It’s a sound most parents will not forget once they have heard. If you’ve been lying awake wondering whether your kids are grinding their teeth in sleep is something to worry about, you’re not alone. It’s one of the most common questions paediatric dentists get asked.

The good news is that teeth grinding in children, or paediatric bruxism, is very common, often harmless, and frequently outgrown. The trickier part is knowing when it’s a passing phase and when it’s worth a closer look.

Here’s what’s actually going on, what to watch for, and what helps.

Why Children Grind Their Teeth

Teeth grinding tends to peak between ages 3 and 6, when baby teeth are coming through, and the bite is still developing. By the time adult teeth come in and the bite settles, the grinding often stops on its own.

There’s no single cause, but the common contributors include:

• A still-developing bite — when upper and lower teeth don’t yet meet evenly, children can grind subconsciously, trying to find a comfortable resting position.
• Stress or anxiety — even in young children. Starting school, a new sibling, a family change, or a busy schedule can all show up at night as grinding.
• Sleep patterns — bruxism often happens during light sleep stages or transitions between stages.
• Allergies, blocked airways, or mouth breathing — these can affect jaw position and contribute to the grinding.
• Earache or teething discomfort — particularly in younger children.

In other words, what looks worrying at 2 am is often just a small body working through normal developmental changes during sleep.

Signs That It’s More Than a Phase

For many children, teeth grinding at night in kids is mild, infrequent, and causes no lasting issues. But some signs suggest it’s worth seeing a dentist:

• Worn, flat, or chipped teeth — particularly the front teeth.
• Complaints of jaw soreness or headaches, especially in the morning.
• Sensitivity to hot or cold that wasn’t there before.
• Tired or irritable mornings, suggesting disrupted sleep.
• Loud, frequent grinding that you can hear from another room.
• Cheek biting or facial muscle tension during the day.

Occasional grinding that’s loud but infrequent is usually fine. However, nightly, prolonged grinding paired with any of the signs above is worth checking.

What About Babies and Toddlers?

A common worry is the first time parents notice grinding in a baby or toddler, once the first tooth or two appear. When a baby suddenly has new teeth meeting opposing gum tissue (or another tooth), grinding is often just exploratory, meaning they are working out what their new teeth feel like.

Here’s the reassuring part: in infants and toddlers, grinding is almost always harmless and short-lived. There’s usually no need to intervene directly. Gentle distraction during the day and a bit of time tend to resolve it as more teeth come through and the novelty wears off.

That said, if the grinding continues into the older toddler years or becomes very forceful, mention it at the next check-up.

What You Can Do at Home

If your child is otherwise healthy and the grinding is mild, there are some sensible things to try. The honest truth is that you usually can’t stop sleep grinding directly, but you can reduce the triggers that fuel it.

Settle the wind-down routine. A calm, predictable bedtime reduces nervous system arousal that can carry into the night.

Address any daytime stress. Even young children pick up on family tension, school pressure, or schedule changes. Open conversations and predictable routines often help more than you’d expect.

Check for mouth breathing or blocked airways. If your child snores, breathes through their mouth, or seems congested at night, talk to your GP. Treating the underlying issue often reduces the grinding.

Keep them hydrated and avoid stimulating foods late. Sugar and caffeine (yes, including chocolate) close to bedtime can amplify restless sleep.

Don’t wake them or correct them. Trying to stop a child mid-grind usually disturbs their sleep more than it helps. The grinding itself is not a conscious habit.

If you’ve tried these and the grinding continues, the next step is usually a dental check-up. Our team can take a look and rule out anything underlying.

When to See a Dentist

Book a dental visit if you notice:

• Visible wear, chipping, or flattening of the teeth
• Persistent jaw, ear, or morning headache complaints
• Sleep that’s clearly disrupted (very tired mornings, mood changes)
• Grinding that’s continued past age 6–7 and isn’t slowing down

At the appointment, your dentist will check tooth wear, look at how the upper and lower teeth meet, and ask about sleep and behaviour patterns. In some cases, no treatment is needed, just monitoring. 

In other cases, child bruxism treatment may be recommended.

What Child Bruxism Treatment Actually Looks Like

Treatment depends on the cause and severity. Common approaches include:

• Monitoring over time. Many children outgrow grinding without intervention.
• Stress-reduction strategies, sometimes with input from a GP or psychologist if anxiety is a factor.
• Treating underlying airway or allergy issues — often the most impactful step for kids whose grinding is breathing-related.
• A custom-made kids’ teeth grinding mouth guard. For older children with significant wear, a soft night guard fitted by a dentist can protect the teeth and ease jaw muscles. These are sized for growing mouths and replaced as the child develops.

For kids who feel anxious about visiting the dentist generally, our blog on dental anxiety in children has some practical tips for making appointments feel safer.

Most Children Grow Out of It, But It’s Worth Checking

If you’ve been hearing the late-night grind and quietly worrying, here’s the takeaway: sleep grinding in children is very common, often outgrown, and rarely a sign of anything serious, but the cases where it does need attention are easier to manage when caught early. 

A short, friendly check-up can tell you which category your child falls into.

If you see any of the signs that you should talk to a dentist for a mouthguard or other treatment options for bruxism, our dentists at Good Smile Dental are happy to look closer at your child’s teeth.

Book an appointment with us to be guided and supported by a qualified dentist in Windsor, NSW.

 

Frequently Asked Questions

Is it normal for toddlers to grind their teeth? 

Yes, a toddler grinding their teeth in sleep is very common, and most kids outgrow it as their adult teeth come through and the bite settles. Toddler grinding teeth while sleeping is rarely a sign of anything serious in younger children.

My baby is grinding his teeth — should I be worried? 

Almost always, no. Parents notice that once those first teeth come in it is usually exploratory and short-lived. How to stop a baby from grinding their teeth typically doesn’t require much beyond gentle distraction and patience.

Is toddler grinding teeth when asleep different from grinding while awake? 

Yes. Daytime grinding is usually a conscious habit that children can be gently redirected from. Grinding teeth in sleep in kids is involuntary and is better addressed by reducing triggers (stress, airway issues) than by trying to stop the grinding itself.

Will grinding damage my child’s baby teeth? 

Mild grinding usually doesn’t cause lasting issues, as baby teeth are eventually replaced. Heavy, prolonged grinding can wear teeth faster than expected, which is when a check-up is worthwhile.

How to stop kids grinding teeth at night — does anything really work? 

There’s no quick switch, but addressing the underlying cause helps most. A calm bedtime routine, treating any airway or allergy issues, and reducing daytime stress are usually more effective than trying to stop the grinding directly.

Should I give my child a store-bought mouth guard? 

Generic mouth guards are not recommended for kids because they don’t fit growing mouths well and can interfere with breathing during sleep. If a guard is needed, a custom one from a dentist is the safer choice.

Can stress really cause teeth grinding in children while sleeping? 

Yes, even minor disruptions like a new school, a sibling, or changes at home can show up as grinding at night. It’s the nervous system letting off pressure during sleep.

At what age should I be concerned about grinding teeth kids do at night? 

If grinding continues past age 6–7 and is not easing, or if you notice wear, headaches, or sleep issues, it’s worth a check-up. Kids tend to outgrow teeth grinding at night naturally, but they can still benefit from a quick look to confirm no damage is building up.

Does mouth breathing cause teeth grinding? 

It can contribute. If your child snores or breathes through their mouth at night, mention it to your GP and dentist. Addressing the airway often reduces the grinding.

Do children outgrow teeth grinding? 

Most do, particularly as adult teeth come through and the bite stabilises. A small number continue into adulthood and may benefit from longer-term management.