Teeth Grinding (Bruxism) in Kids: Causes, When to Worry, and What Helps

That squeaky, gritty sound coming from your child’s bedroom at night has a name: bruxism, the habit of grinding or clenching the teeth, usually during sleep. Here’s the short answer most parents and guardians are looking for. Children grind for a handful of common reasons, including new teeth coming in, a bite that hasn’t settled yet, stress, and sometimes a breathing problem during sleep. Most of them grow out of it with no lasting damage. It’s worth a closer look when your child has tooth or jaw pain, teeth that look chipped or flattened, or sleep that seems restless and noisy in other ways, like loud snoring. What helps depends on the cause, which is why figuring out the “why” comes before choosing a fix.

So what is actually happening? During lighter stages of sleep, the jaw muscles can tighten and slide the teeth against each other, sometimes with surprising force for such a small mouth. Your child almost never knows it’s happening, and plenty of kids don’t make any noise at all, so bruxism in children often goes unnoticed until a dental exam shows the wear. Baby teeth have thinner enamel than permanent teeth, so flattened edges can appear faster than parents and guardians might expect. Estimates of how many children grind vary widely, from around 6% to nearly half, and it shows up most often during initial teething and between ages 5 and 10, while the mouth is trading baby teeth for permanent ones. The wear pattern itself tells a dentist a lot. Where the teeth are flattening, how deep the wear goes, and whether the bite lines up all point toward what’s driving the habit.

At Northfield Pediatric Dentistry, we treat grinding as a clue, not just a habit to stop. Dr. Rosalyn Shkolnikov (Dr. Roz), a board-certified pediatric dentist who completed her general and pediatric dental residency at NYU Langone Hospital, reviews jaw growth, bite alignment, and airway development during exams, so grinding gets considered alongside the rest of your child’s growth. Many families come in worried that grinding means a big treatment plan. Usually it doesn’t. Most of the time the plan is to track the wear over a few visits and adjust a few bedtime habits. Children with special healthcare needs or sensory sensitivities tend to grind more often, and they also tend to find dental visits harder. Our rooms have dimming lights, weighted blankets, and noise-cancelling headphones so the exam itself feels manageable for them.

This Article Will Address

• The most common reasons children grind at night
• Whether it’s a phase your child will outgrow
• Warning signs that call for a dental visit
• How grinding can connect to snoring and breathing during sleep
• When a night guard makes sense, and when it doesn’t
• Simple steps families can take at home

Why Does My Child Grind Their Teeth at Night?

Most nighttime grinding in children comes from a few sources: teeth that are erupting or shifting, a bite that doesn’t fit together smoothly yet, stress carried into sleep, or disrupted breathing that keeps pulling the body out of deep sleep. Often more than one is at work.

• Tooth changes. Babies and toddlers often start grinding soon after their first front teeth arrive, and school-age kids may start again as permanent teeth push in.
• Bite and alignment. When the upper and lower teeth don’t meet evenly, the jaw may slide back and forth looking for a comfortable resting spot.
• Pain somewhere else. An ear infection or an aching tooth can set off grinding as a response to the discomfort.
• Stress and big feelings. A new school, a move, or a new sibling can show up as clenching after lights out.
• Breathing during sleep. Snoring, congestion, or enlarged tonsils and adenoids can break up sleep, and grinding often happens during those brief wake-ups.
• Health conditions and medications. Grinding is more common in children with cerebral palsy, Down syndrome, and other developmental conditions, and some medicines can play a role.

Family history matters too. Children whose parents or guardians grind their teeth are more likely to do it themselves.

Is Nighttime Grinding Normal in Kids, and Will They Outgrow It?

Yes, for most children it’s a normal stage, and the majority outgrow it on their own, usually once the permanent teeth have come in and the bite settles. Grinding tends to cluster around two windows: when baby teeth first erupt, and again when permanent teeth replace them, roughly between ages 6 and 12. Grinding in babies is rarely a concern and typically fades without harming the teeth.

Outgrowing it isn’t guaranteed, though. Some children keep grinding into their teen years, especially when the underlying cause, such as a breathing issue or ongoing stress, hasn’t changed. That’s why “wait and see” works best with a dentist doing the watching. Comparing the wear from one checkup to the next shows whether things are stable or getting worse, and it lets us step in before permanent teeth, which have to last a lifetime, start to show damage.

What Signs Mean It’s Time to See a Pediatric Dentist?

Book a visit if grinding comes with pain, visible damage to the teeth, or other signs of poor sleep. Noise on its own usually isn’t urgent, but it’s worth bringing up at your child’s next dental exam. Watch for:

• Complaints of sore teeth, jaw pain, or morning headaches
• Teeth that look chipped, cracked, unusually short, or flat on top
• New sensitivity to cold drinks or ice cream
• Earaches with no sign of an ear infection
• Clicking or popping in the jaw, or trouble opening wide
• Loud snoring, gasping, or mouth breathing during sleep
• Daytime sleepiness, irritability, or trouble focusing at school

At the visit, Dr. Roz looks for wear spots, checks how the teeth meet, and evaluates the jaw. If she needs a closer look at the roots or the permanent teeth still developing underneath, our digital low-radiation X-rays give that view with minimal exposure. It helps a lot if you bring notes on when the grinding happens and how often. A short phone recording of the sound at night is even better.

Is Grinding Linked to Airway or Breathing Issues?

Sometimes, yes. Sleep bruxism has been linked to obstructive sleep apnea and other kinds of sleep-disordered breathing, and in some children it’s one of the first visible signs that breathing at night isn’t as smooth as it should be. One explanation is that when the airway narrows, the brain briefly rouses the body, and the jaw clenches and shifts forward as part of that response.

That doesn’t mean every child who grinds has a breathing problem. Most don’t. But grinding paired with snoring, open-mouth breathing, restless sleep, or bedwetting deserves attention, since poor sleep affects mood, focus, and growth. An airway screening can pick up clues such as a narrow palate, crowding, or large tonsils, and if something points toward a breathing concern, we’ll talk with you about following up with your child’s pediatrician. We go deeper on this in our article on how airway, sleep, and breathing show up in pediatric dental screenings.

Should My Child Wear a Night Guard?

Usually not as a first step. For young children with mostly baby teeth, a night guard is rarely recommended, because the mouth grows and changes so quickly that a guard can stop fitting within months, and it does nothing about why the grinding is happening. Guards make more sense for older children and teens with most of their permanent teeth in place who are showing real wear, pain, or jaw soreness.

When the bite is part of the problem, correcting it can do more than a guard ever would. That’s where selective interceptive orthodontics can help: in some cases, guiding jaw growth or tooth position early reduces the forces behind grinding, and Dr. Roz refers to an orthodontist when a child needs more extensive treatment. If grinding has already damaged a tooth, a filling or crown may be part of the plan as well. Every child’s timing is different, so we decide case by case.

What Can Parents and Guardians Do at Home to Help?

Calm evenings, steady sleep habits, and paying attention to what’s on your child’s mind do the most good at home. These steps won’t fix a bite or a breathing problem, but they cut down on the stress-related grinding that’s so common in school-age children.

• Build a wind-down routine with a warm bath, a book, and dim lights in the last half hour before bed
• Turn off screens at least an hour before sleep
• Skip caffeine in the afternoon and evening, including soda, iced tea, and chocolate
• Ask about worries at a relaxed moment, like the car ride home, rather than right at bedtime
• Treat congestion and allergies with your pediatrician’s guidance so your child can breathe through the nose
• Keep a simple log of grinding nights to spot patterns, like test weeks or late bedtimes

And keep up with routine preventive care. A checkup every six months is the most reliable way to catch wear early, since kids rarely notice it themselves.

Now Welcoming New Families: Book Your Child’s Bruxism Evaluation Today

If the grinding at your house has you wondering whether it’s a phase or something more, we’d be glad to help you find out. Northfield Pediatric Dentistry is accepting new patients in Denver, CO, and Dr. Roz and our team welcome questions from parents and guardians about grinding, snoring, and jaw pain. Call, email, or schedule a grinding evaluation with our team. Bring your notes and any nighttime recordings, and we’ll take it from there.

Sources

• Bruxism (Teeth Grinding or Clenching), Nemours KidsHealth
• Teeth Grinding in Children: Causes and Treatment, Sleep Foundation
• Bruxism (Teeth-Grinding), Seattle Children’s Hospital