What Is Bruxism?
Bruxism is the involuntary grinding or clenching of teeth. It can occur during the day, but it is far more common at night during sleep. Because children are unaware they’re doing it, parents or siblings usually notice the grinding first.
Bruxism can involve:
- Grinding the teeth back and forth
- Clenching the jaw muscles tightly
- Pressure on the temporomandibular joint (TMJ)
- Wearing down of the enamel (the hard outer layer of the tooth)
Nighttime bruxism is more common between the ages of 3 and 10, and many children stop grinding as they lose their baby teeth and their occlusion (bite) matures.
Why Do Kids Grind Their Teeth?
There isn’t a single cause of bruxism. For most children, it is a combination of normal development, oral habits, and sometimes emotions. Here are the most common reasons kids grind their teeth at night:
- Normal Tooth Eruption
When new primary teeth or permanent teeth erupt, the jaw and bite are constantly changing. Children may grind to “test out” their new bite or relieve mild discomfort from eruption.
- Misaligned Bite (Malocclusion)
If the upper and lower teeth do not fit together comfortably, the jaw muscles may subconsciously try to find a better position. This can lead to grinding during sleep.
A pediatric dentist can check your child’s occlusion, crowding, spacing, and jaw alignment.
- Stress or Anxiety
Even young children can feel stress, especially during:
- Changes in routine
- Starting school
- Illness
- Travel
- Family transitions
Kids may clench their jaw or grind their teeth as a response to emotional tension — just like adults.
- Pain or Discomfort
Children may grind their teeth to cope with pain, especially from:
- Ear infections
- Teething
- Sinus congestion
- Sore jaw muscles
Bruxism can act like a soothing response to pressure.
- Sleep-Related Issues
Grinding is more common in children who have:
- Snoring
- Enlarged tonsils or adenoids
- Sleep apnea
- Restless sleep
Addressing airway issues often reduces bruxism.
- Medical Conditions or Medications
Bruxism is more likely in children with:
- ADHD
- Autism spectrum disorder
- Neuromuscular conditions (e.g., cerebral palsy)
Certain medications, especially stimulants, may also contribute to grinding.
- Family History
Bruxism tends to run in families. If you or your partner grind your teeth, your child is more likely to develop the habit too.
What Are Signs of Bruxism?
Parents often notice the nighttime sounds, but these additional signs can also point to bruxism:
- Flattened or worn-down teeth
- Chipped enamel
- Tooth sensitivity (hot/cold)
- Jaw pain in the morning
- Soreness when chewing
- Headaches
- Tight jaw muscles
- Clicking or popping in the TMJ
- Cheek or lip biting during sleep
A dentist can examine your child’s enamel, jaw development, and bite patterns to determine the severity.
Is Teeth Grinding Dangerous?
Most childhood bruxism is not harmful and does not require treatment. Baby teeth are softer and naturally wear as part of normal growth. However, more severe bruxism can lead to:
- Enamel erosion
- Fractured or chipped teeth
- Jaw pain or TMJ strain
- Headaches
- Poor sleep
- Increased risk of cavities (if enamel thins)
This is why regular dental checkups are important, especially while the bite is changing.
What Can Parents Do?
Here are simple, effective ways to help reduce bruxism and protect your child’s teeth:
- Establish a Calming Bedtime Routine
Create a predictable evening schedule:
- Warm bath
- Quiet story time
- Soothing music
- Dim lights
Relaxation helps reduce grinding related to stress or tension.
- Talk About Stress or Worries
If your child seems anxious, help them express their feelings. A few minutes of gentle conversation often makes a big difference.
- Improve Sleep Hygiene
Good sleep reduces nighttime grinding.
Try:
- Consistent sleep schedule
- No screens 1-2 hours before bed
- A cool, dark bedroom
- White noise if needed
- Limited sugary snacks before bed
- Manage Jaw Discomfort
If your child wakes with a sore jaw, try:
- Warm compress on the cheeks
- Gentle massage
- Soft foods for a day
- Encouraging slow, mindful chewing
Avoid hard foods like nuts, popcorn, ice, or hard candies during flare-ups.
- Monitor Teeth and Bite Changes
Routine visits to your pediatric dentist allow early detection of:
- Malocclusion
- Jaw imbalance
- Sensitivity
- TMJ issues
Early intervention prevents long-term problems.
- Nightguards (But Only for Older Kids)
Nightguards or occlusal splints may be recommended for:
- Severe grinding
- Chipped enamel
- Significant jaw pain
These are not recommended for toddlers or very young children because their teeth are still shifting.
- Treat Airway Problems
If your child snores, mouth breathes, or seems unrested, speak to your pediatrician or dentist. Treating tonsils, adenoids, or allergies can dramatically improve bruxism.
When Should You Call the Dentist?
Book a dental appointment if your child:
- Grinds loudly most nights
- Complains of jaw pain
- Has headaches or difficulty chewing
- Has sensitive or worn-down teeth
- Has a change in their bite
- Shows changes in sleep or behaviour
- Snores heavily or mouth breathes
Early evaluation keeps your child’s teeth healthy and protected.
The Bottom Line
Childhood bruxism is extremely common and usually harmless. Most kids grow out of it as their bite changes and permanent teeth erupt. With a healthy sleep routine, good oral hygiene, and regular dental checkups, you can help protect your child’s teeth and keep their smile developing properly.
If you’re ever unsure, your dentist can examine your child’s enamel, bite, and jaw to ensure everything is on track — and help guide you through the best next steps.
References
https://kidshealth.org/en/parents/bruxism.html
https://myhealth.alberta.ca/Health/aftercareinformation/pages/conditions.aspx?hwid=zb1358
https://www.colgate.com/en-us/oral-health/bruxism/bruxism-in-children-signs-symptoms
https://www.healthline.com/health/parenting/toddler-teeth-grinding
