That sound—a harsh, grating noise coming from your child’s bedroom—can be alarming. You trace it to your child, who is fast asleep but intensely grinding their teeth.
This condition, known as bruxism, is incredibly common. In fact, studies show that 2 to 3 out of every 10 children will grind or clench their teeth at some point.
While it’s often a harmless phase they will outgrow, it can sometimes be a sign of an underlying issue. This guide will walk you through what causes teeth grinding, what to look for, and when it’s time to see a dentist.
What is Bruxism and Why Does it Happen?
Bruxism is the medical term for grinding or clenching teeth. It can happen while a child is awake (awake bruxism) but is far more common during sleep (sleep bruxism), meaning the child has no control over it.
While the exact cause isn’t always clear, pediatric specialists have identified several common triggers.
1. Physical Discomfort
- Teething and Tooth Eruption: This is a primary cause in infants and toddlers. The discomfort of new teeth (both baby and permanent) pushing through the gums can cause a child to grind.
- Earaches: Just like adults, children may clench their jaw in response to pain elsewhere, especially from an earache.
- Improperly Aligned Teeth (Malocclusion): If a child’s top and bottom teeth don’t fit together comfortably, they may grind as their jaw seeks a “better” fit.
2. Stress, Anxiety, or Hyperactivity
- Psychological Stress: A new school, a test, a new sibling, or family tension can manifest physically. Grinding is a common subconscious response to worry or anxiety.
- Hyperactivity: Some studies have linked bruxism to children with ADHD (Attention Deficit Hyperactivity Disorder).
- Personality Type: Children who are more energetic, determined, or anxious may be more prone to grinding.
3. A Major Underlying Cause: Sleep-Disordered Breathing
This is one of the most important connections for parents to understand. In many cases, sleep bruxism is a response to an obstructed airway.
Here’s the mechanism:
- If a child’s airway is partially blocked (often by enlarged tonsils or adenoids), their oxygen levels can dip.
- The brain senses this and triggers a “fight-or-flight” response to reopen the airway.
- This response involves tensing the jaw muscles and thrusting the jaw forward—which causes the teeth to grind.
In this scenario, the grinding isn’t the problem; it’s a symptom of a more serious issue like pediatric sleep apnea.
Signs and Symptoms: What to Look (and Listen) For
Since most grinding happens at night, many children are unaware they’re doing it. The first clue is often a parent or sibling hearing the noise.
Other signs include:
- Headaches: Frequent, unexplained headaches, especially in the morning.
- Earaches: Complaints of ear pain when there is no infection.
- Jaw Pain: Soreness in the jaw muscles or joints (the temporomandibular joint, or TMJ) upon waking.
- Facial Pain: A dull, aching pain in the face.
- Worn Teeth: Your dentist is the most likely person to spot this. They will see flattened, worn-down spots on the tops of the molars or chipping on the front teeth.
- Tooth Sensitivity: Worn-down enamel can expose the sensitive inner layers of the tooth.
Does Teeth Grinding Cause Long-Term Harm?
For the vast majority of children, bruxism is a temporary phase that causes no lasting damage. Most outgrow it by their teenage years as their permanent teeth finish erupting and their bite stabilizes.
However, in persistent or severe cases, it can lead to:
- Excessive Enamel Wear: Grinding can wear down the protective enamel, making teeth more vulnerable to cavities.
- Chipped or Fractured Teeth: The force can be strong enough to crack teeth.
- TMD (Temporomandibular Disorders): Chronic clenching can damage the jaw joint, leading to chronic pain, clicking, and popping.
- Chronic Headaches: What starts as an occasional morning headache can become a regular issue.
What to Do: A Parent’s Action Plan
If you suspect your child is grinding their teeth, here are the steps to take.
Step 1: Observe and Reassure
First, don’t panic. It’s very common. If the only symptom is the sound, your dentist will likely recommend a “watch and wait” approach. If your child is stressed, focus on creating a relaxing environment, especially before bed. A warm bath, reading a book together, or playing quiet music can all help.
Step 2: See Your Pediatric Dentist
This is the most important step. At your child’s next checkup, be sure to mention your concerns. Your dentist will:
- Examine the teeth for wear, chips, and sensitivity.
- Check the jaw muscles for tenderness.
- Ask questions to help pinpoint the cause, including questions about stress, pain, and—critically—snoring.
Step 3: Investigate Potential Medical Causes
If your dentist or pediatrician suspects a medical issue, they may refer you.
- Pediatrician: To rule out ear infections or other sources of pain.
- ENT (Ear, Nose, and Throat Specialist): If your child also snores, breathes through their mouth, or has restless sleep, the dentist will likely refer you to an ENT. The ENT will check their tonsils and adenoids to see if they are obstructing the airway.
Step 4: Dental Treatments (If Necessary)
While most children don’t need treatment, your dentist has options if the grinding is causing damage.
- Night Guards: A custom-made plastic guard that fits over the teeth. It doesn’t stop the grinding, but it protects the teeth by providing a soft cushion to grind against.
- Important Note on Night Guards: Dentists are often hesitant to use night guards for young children with baby teeth. The guards can sometimes interfere with the natural growth of the jaw and the eruption of permanent teeth. They are more commonly used for older children with permanent teeth or in very severe cases.
- Restorations: If a tooth is badly chipped or worn, the dentist may need to apply a sealant or crown to protect it from further damage.
The Takeaway: Don’t Worry, But Do Report It
Teeth grinding is a normal part of development for many children. It’s often a temporary response to growth, pain, or stress. However, because it can be a red flag for issues like sleep-disordered breathing, it’s not something to ignore.
Always report your concerns to your pediatric dentist. They are your best partner in monitoring the situation and ensuring your child’s smile stays healthy and protected.