Hearing your child grind their teeth at night can be alarming, but it is very common and most children outgrow it. Night-time grinding, known as sleep bruxism, is reported in a large share of children, with estimates ranging widely from around 1 in 7 up to a third or more depending on the study. It tends to ease as children get older and their adult teeth and bite settle, often around ages 9 to 10. In most cases it causes no lasting harm and needs no treatment, though a few situations are worth a dentist's look.
This guide explains why children grind, what to watch for, and when to seek advice.
Key takeaways
- Night-time grinding is common in children and usually harmless.
- Most children outgrow it as their adult teeth come through and the bite settles.
- Causes can include the developing bite, disrupted sleep, blocked airways and stress.
- Standard adult night guards are rarely used in young children because their mouths are still growing.
- See a dentist if teeth are wearing down, if there is tooth pain, or if grinding comes with snoring or broken sleep.
Why children grind their teeth
There is no single cause. In young children the bite is constantly changing as baby teeth are lost and adult teeth arrive, and grinding may be part of the mouth adjusting. Other recognised links include disrupted sleep, blocked nasal breathing from enlarged tonsils or adenoids, and stress or excitement around bedtime. Because sleep and breathing are often involved, persistent grinding alongside snoring or restless sleep is worth mentioning to your dentist or doctor.
Is it harmful?
Usually not. Baby teeth are replaced, so some surface wear on them is rarely a long-term problem. The main things a dentist watches for are noticeable flattening or chipping of teeth, sensitivity or pain, and jaw or facial soreness in the morning. These are uncommon in children but are the signs that grinding is heavy enough to act on. If your child complains of jaw pain, our guide to jaw pain and the TMJ may help.
What helps at home
For most children, reassurance and a calm bedtime routine are the main steps. A wind-down before bed, limiting screens late in the evening, and making sure your child is not overtired can all reduce grinding. If a blocked nose or heavy snoring is part of the picture, treating that often helps the grinding too. Keeping up good brushing habits and regular check-ups lets the dentist monitor any wear over time.
| Situation | What it usually means |
|---|---|
| Occasional grinding, no wear or pain | Monitor at routine check-ups, no treatment |
| Grinding with snoring or restless sleep | Mention to dentist and GP, check breathing |
| Visible tooth wear or chipping | Dental assessment, possible protective options |
| Morning jaw pain or headaches | Dental assessment |
Do children need a night guard?
Standard hard night guards, the kind made for adults, are used with care in young children because the jaws and teeth are still growing and a fixed appliance can interfere with that growth and with erupting teeth. For most children the plan is to monitor, since the habit tends to fade on its own. Where wear is significant, a dentist may consider a soft, well-fitted appliance and review it often as the child grows. This is an individual decision, not something to buy off the shelf. Our guide to night guards for grinding explains the adult picture for comparison.
When to see a dentist
Book a check if you notice teeth looking flatter or chipped, if your child has tooth sensitivity or jaw pain, or if grinding goes hand in hand with loud snoring, pauses in breathing or very broken sleep. These do not mean something is seriously wrong, but they are worth assessing. Regular visits also let the dentist keep an eye on the developing bite. If this is your child’s first visit, our first visit guide covers what to expect.
Frequently asked questions
Why does my child grind their teeth in their sleep?
Common reasons include the changing bite as teeth come and go, disrupted or light sleep, blocked nasal breathing, and stress or excitement at bedtime. Often no single cause is found.
Will my child grow out of teeth grinding?
Most do. Grinding usually decreases with age and often settles around ages 9 to 10 as the adult teeth come through and the bite matures.
Should my child wear a night guard?
Usually not routinely. Standard guards can interfere with a growing mouth, so most children are simply monitored. A dentist may consider a soft appliance if there is significant wear.
Can grinding damage my child’s teeth?
Heavy grinding can wear or chip teeth, but this is uncommon. Because baby teeth are replaced, occasional grinding rarely causes lasting harm. A dentist can check for wear.
Is grinding linked to sleep problems?
It can be. Grinding sometimes goes with snoring, mouth breathing or disrupted sleep, so it is worth mentioning these to your dentist and GP so breathing can be checked.
The takeaway
Night-time teeth grinding is common in children, usually harmless and most often outgrown as the adult teeth and bite settle. Watch for tooth wear, pain or grinding that comes with snoring or broken sleep, and raise those with your dentist. A calm bedtime and regular check-ups are usually all that is needed. To have your child’s teeth checked, see our current offers or read our first visit guide.
This article is general information and not a substitute for an individual dental assessment.
