Children grind their teeth for several reasons, including stress, bite misalignment, new teeth erupting, and inner ear pressure changes during sleep. The medical term for teeth grinding is bruxism, and it affects an estimated 15 to 35% of children at some point during childhood (Nemours KidsHealth). Most children outgrow the habit on their own, but persistent grinding can wear down enamel and cause jaw pain. Below, we cover the most common causes, the signs parents should watch for, when treatment is needed, and how to help your child at home.
How Common Is Teeth Grinding in Children?
Teeth grinding is far more common in children than most parents realize. Estimates from pediatric dental research place the prevalence between 15% and 35% of all children, with the highest rates occurring in preschoolers and early elementary-age kids (Lonestar Kids’ Dentistry/AAPD). A 2025 study published in the Journal of Oral Rehabilitation found that parent-reported tooth grinding was present in 70.8% of a sample of over 900 preschoolers, though this included both grinding and clenching behaviors (Journal of Oral Rehabilitation).
Bruxism is more common in younger children and tends to decrease with age. According to the American Academy of Pediatrics, teeth grinding is especially common in toddlers and preschoolers, and most children outgrow the habit by age 6 (AAP). For those who continue, grinding typically decreases between ages 6 and 9 and often stops by ages 9 to 12 (AAPD). Boys and girls are affected at similar rates.
We monitor for signs of teeth grinding during routine checkups at our Yorktown Heights office. If your child grinds their teeth, we can assess the extent of any wear and recommend the right approach.
What Causes Teeth Grinding in Children?
The exact cause of bruxism in children is not fully understood, but research points to several contributing factors. In most cases, more than one factor is involved.
Stress and anxiety are among the most commonly cited causes. The American Academy of Pediatrics notes that children who worry about school, family changes, friendships, or other pressures often grind or clench their teeth during sleep (AAP). Even everyday stressors like a new school, a move, or conflict with siblings can trigger nighttime grinding.
Bite misalignment and tooth position also play a role. When the upper and lower teeth do not fit together properly, the jaw may move and grind during sleep as it tries to find a comfortable resting position. Overcrowded teeth or an uneven bite can contribute to this pattern.
New teeth erupting can cause temporary grinding. As baby teeth fall out and permanent teeth push through the gums, the changing bite may feel unfamiliar. Many children grind as a natural response to the new sensations in their mouth.
Inner ear pressure is another theory. Some researchers believe that pressure changes in the inner ear, similar to what happens during an airplane takeoff, may prompt children to move their jaw and grind to equalize the pressure (AAPD).
Other contributing factors include allergies and nasal congestion (which affect breathing patterns during sleep), certain medications (particularly those used for ADHD and other conditions), hyperactivity, dehydration, and nutritional deficiencies. A study in BMC Oral Health found a statistically significant association between bruxism and headache, tooth sensitivity, muscle stiffness, and the presence of stress in children (BMC Oral Health).
Secondhand smoke exposure has also been linked to an increased risk. The AAP notes that secondhand smoke from tobacco or cannabis can trigger bruxism in children (AAP).
If your child grinds their teeth, a pediatric dental evaluation can help identify contributing factors and guide the best response.
Signs Your Child May Be Grinding Their Teeth
Most children do not realize they grind their teeth during sleep. Parents, siblings, or caregivers are usually the first to notice the problem. Here are the most common signs to watch for.
Grinding sounds during sleep are the most obvious indicator. The noise can range from a faint rubbing to a loud, audible scraping that wakes other family members.
Worn, flattened, or chipped teeth are visible signs that grinding has been happening for some time. Your child’s dentist may notice uneven wear patterns during a routine exam before you see any changes at home.
Jaw pain, facial soreness, or headaches upon waking are common in children who grind frequently. If your child complains of pain near the ears, cheeks, or temples in the morning, bruxism may be the cause.
Tooth sensitivity to hot, cold, or sweet foods can develop as the enamel wears thinner from repeated grinding. If your child suddenly becomes sensitive to foods they previously ate without discomfort, that change is worth mentioning at their next dental visit.
Disrupted sleep, restless nights, or daytime fatigue may also be connected to bruxism, since grinding can interrupt deep sleep cycles.
We check for these signs at every six-month checkup. Families in Cortlandt Manor, Peekskill, and Shrub Oak can bring their child to our Yorktown Heights office for an evaluation.
When Teeth Grinding Needs Treatment
The majority of childhood bruxism does not require treatment. According to the AAPD, most cases resolve on their own without intervention as the child’s teeth and jaw continue to develop (AAPD). However, there are situations where professional care is needed.
Treatment should be considered if the grinding is causing significant wear on the teeth, if your child wakes up with jaw pain or headaches regularly, or if the habit persists well beyond age 9 to 12. If baby teeth show heavy wear, the dentist will monitor whether the developing permanent teeth are also at risk.
For children with excessive tooth wear, a custom-fitted night guard (mouth guard) may be recommended. This removable appliance is worn during sleep to protect the teeth from grinding forces. Night guards are more commonly recommended for older children and adolescents whose permanent teeth are in place. For younger children, the dentist may choose to monitor and wait rather than prescribe a guard, since the mouth is still growing.
If the grinding is related to a bite problem, early interceptive orthodontics may be part of the solution. Correcting bite alignment can reduce the forces that trigger grinding and protect both baby and permanent teeth.
For children with anxiety-driven bruxism, addressing the underlying stress is key. This may involve working with your child’s pediatrician, establishing calming bedtime routines, and reducing screen time before sleep. If your child also experiences dental anxiety during visits, our team offers gentle sedation options to keep them comfortable during exams and treatment.
Strengthening your child’s enamel through professional fluoride treatments can also help protect teeth that are subject to grinding forces. Stronger enamel resists wear better and reduces the risk of sensitivity.
Our team also offers habit-breaking appliances and space maintainers for children with oral habits that affect dental development.
Bruxism Causes and Risk Factors at a Glance
| Factor | How It Contributes | What Parents Can Do |
| Stress or anxiety | Emotional tension causes jaw clenching during sleep | Calming bedtime routines, talk with pediatrician |
| Bite misalignment | Upper and lower teeth do not fit together properly | Orthodontic evaluation by age 7 |
| New teeth erupting | Changing bite feels unfamiliar, triggering grinding | Monitor; usually resolves on its own |
| Allergies or congestion | Mouth breathing during sleep alters jaw position | Treat allergies, consult pediatrician |
| Inner ear pressure | Jaw movement may equalize pressure during sleep | Monitor; resolves as the child grows |
| Medications (e.g., ADHD) | Certain medications list bruxism as a side effect | Discuss timing or alternatives with prescriber |
| Secondhand smoke | Smoke exposure linked to increased grinding risk | Eliminate exposure in the home and car |
Sources: American Academy of Pediatrics (AAP), American Academy of Pediatric Dentistry (AAPD), Nemours KidsHealth, BMC Oral Health
How to Help Your Child at Home
While most childhood bruxism resolves with time, parents can take steps at home to reduce grinding and keep their child comfortable.
Establish a calming bedtime routine. A warm bath, quiet reading, or gentle stretching before bed can help your child’s body and jaw relax. Avoid screen time, active play, and stimulating activities in the hour before sleep.
A warm, damp washcloth held against the jaw before bed can relax the muscles and reduce clenching. This is a simple, effective technique that many pediatric dentists recommend.
Keep your child well hydrated. Dehydration has been suggested as a possible contributor to nighttime grinding, so offering water throughout the day is a good habit to maintain.
Limit caffeine intake. Chocolate, certain teas, and sodas contain caffeine that can increase muscle activity during sleep. Reducing these, especially in the afternoon and evening, may help.
Talk to your child if stress seems to be a factor. Giving children a safe space to discuss what is bothering them, whether it is school, friendships, or changes at home, can reduce the emotional tension that contributes to grinding.
Continue with regular dental visits. Your child’s dentist can track changes in tooth wear over time and step in with treatment before significant damage occurs. Families in Somers, Jefferson Valley, and Mohegan Lake can schedule a first visit at our Yorktown Heights office to begin monitoring.
Frequently Asked Questions
When should I be concerned about my child grinding their teeth?
You should be concerned about your child grinding their teeth if you notice visible wear or flattening on the tooth surfaces, if your child complains of jaw pain or headaches in the morning, or if the grinding persists beyond age 9 to 12. Occasional grinding in toddlers and young children is common and usually harmless. But if the grinding is loud, frequent, or causing pain, a visit to a pediatric dentist in Yorktown Heights can determine whether treatment is needed.
What age do kids usually stop grinding their teeth?
Kids usually stop grinding their teeth between the ages of 9 and 12. The habit tends to decrease between ages 6 and 9 as permanent teeth come in and the bite stabilizes. The American Academy of Pediatrics reports that most children outgrow bruxism, though some continue into their teen years and may need a night guard to protect their permanent teeth.
Is teeth grinding a symptom of anything?
Teeth grinding is a symptom of several possible underlying factors, including stress, anxiety, bite misalignment, allergies, sleep-disordered breathing, and certain medications. It has also been associated with hyperactivity and attention conditions. In most children, bruxism is not linked to a single serious condition but rather a combination of developmental and environmental factors.
Is it normal for a 3 year old to grind their teeth?
It is normal for a 3 year old to grind their teeth. Bruxism is very common in toddlers and preschoolers as they adjust to new teeth erupting and the sensations that come with a developing bite. The AAP considers this a typical phase that most children pass through without lasting effects. If your 3 year old in Putnam Valley or Mahopac is grinding and you are concerned, a dental checkup can confirm whether the wear pattern is within a normal range.
Does teeth grinding always need treatment?
Teeth grinding does not always need treatment. The AAPD states that the majority of pediatric bruxism cases resolve without intervention. Treatment is typically recommended only when there is significant tooth wear, persistent pain, or evidence that permanent teeth are at risk. Your pediatric dentist will assess your child’s individual situation and recommend monitoring, a night guard, or orthodontic care if needed.
What foods worsen teeth grinding in kids?
Foods that worsen teeth grinding in kids include those containing caffeine, such as chocolate, certain teas, and sodas. Sugary snacks and acidic drinks can also increase sensitivity in teeth that are already worn from grinding. Hard or chewy foods like ice, popcorn kernels, and tough candy may put additional stress on teeth and jaw muscles. Offering softer foods in the evening and limiting caffeine intake can help reduce grinding at night.
The Bottom Line
Teeth grinding is a common childhood habit that understandably worries parents, but in most cases, it is temporary and harmless. The sound may be alarming, but the majority of children outgrow bruxism as their teeth and jaws mature.
The most important thing you can do is stay aware and keep up with regular dental visits. Your child’s dentist can detect early signs of wear, track changes over time, and recommend treatment only when it is truly needed.
If your child wears braces or clear aligners and also grinds their teeth, let the dental team know so they can factor this into the treatment plan.
At Cohen Family Smiles in Yorktown Heights, we help families across Northern Westchester and Putnam County with bruxism, preventive care, and every stage of their child’s dental development. We serve Katonah, Bedford Hills, Mt. Kisco, Millwood, Croton-On-Hudson, and the greater Hudson Valley. Call us at 914-245-2965 or contact our office to schedule an appointment.
