Why does my child grind their teeth?

That night-time grinding sound can be unsettling to hear — but in most young children it is far more common, and far less worrying, than it feels.

In short

Teeth grinding (clinicians call it bruxism) is very common in childhood — many children do it, especially during sleep, and most simply grow out of it as their adult teeth settle in. Common reasons include new teeth coming through, the natural way jaws line up while growing, mild discomfort, or a way of releasing tension and big feelings. Once in a while, persistent grinding goes alongside sensory needs, disrupted sleep, or stress — which is worth a gentle look. It is a symptom to understand, not a diagnosis to fear.

Why it happens

Most grinding falls into a few everyday patterns:

• Growth and teeth — emerging or shifting teeth, and the jaw finding its natural bite, often trigger grinding that fades with time.
• Sensory regulation — for some children, the firm pressure of clenching or grinding is calming; it can be a way the body seeks input, much like chewing or fidgeting.
• Tension and tiredness — excitement, worry or an overtired body can show up as night-time grinding.
• Sleep and breathing — disturbed sleep, mouth-breathing or blocked nasal airways can be linked, so it is worth mentioning to your doctor or dentist.

When to have a closer look

Most grinding needs only reassurance and time. Do check in with a dentist or your child's doctor if you notice: worn, chipped or sensitive teeth; jaw or face pain on waking; ongoing daytime grinding; or grinding alongside snoring, restless sleep or daytime tiredness. If grinding sits within a wider picture — strong sensory-seeking, big regulation struggles, or other developmental questions — a developmental check helps you see the whole child, not just the symptom.

The Pinnacle way

A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online description or a worried night's listening. If grinding seems tied to sensory needs or regulation, our team can map the full picture through a structured, clinician-led assessment and gentle occupational and sensory therapy where it helps. Start by understanding the symptom itself at teeth grinding.

Trusted sources

American Academy of Pediatrics guidance on childhood bruxism and sleep; HealthyChildren.org parent resources on teeth grinding; WHO frameworks on child functioning and development.

Next step — If grinding is frequent, painful, or paired with sleep or sensory concerns, book a clinician-led assessment for clarity and a simple plan.