A lot of people grinding their teeth have no idea they’re doing it. It often only comes up because a partner mentions it, or because we spot it during a check-up before you’ve noticed anything yourself. Here are five things worth knowing.

1) You can grind your teeth and not know it

A lot of people only find out because:

• A partner hears grinding at night

• A dentist spots wear or cracks

• They start getting symptoms (jaw pain, headaches, sensitivity)

Awake clenching is especially sneaky — it can be a “set jaw” habit you don’t notice until someone points it out.

2) Dentists can usually spot it early

During an exam, we look for patterns that suggest bruxism, like:

• Flattened or worn biting surfaces

• Small chips or fractures (especially on front teeth and edges)

• Cracks in enamel or existing fillings

• Gum recession paired with heavy bite forces

• Tender or enlarged jaw muscles (overworked masseters/temporalis)

• Scalloped tongue edges or cheek “bite lines”

Catching it early matters because the longer it goes on, the more likely you’ll end up with broken fillings, cracked teeth, or persistent jaw symptoms.

3) Bruxism can mimic other problems

Common symptoms can include:

• Toothache without an obvious cavity

• Sensitive teeth

• Morning headaches (often temple-area)

• Neck/shoulder tightness

• Earache or “blocked ear” feeling (with normal ear exams)

• Jaw clicking, stiffness, or limited opening

If you’re repeatedly told your ears are “fine” but the discomfort persists, it’s worth checking whether the jaw joint and chewing muscles are the source.

4) Grinding can do real damage (and it adds up)

Your jaw can generate a surprising amount of force — and grinding can apply that force repeatedly for long periods, often without the normal “feedback” you have when awake.

Over time, we commonly see:

• Cracked teeth (sometimes leading to root canal treatment or extraction)

• Broken fillings/crowns/veneers

• Shorter-looking teeth from wear

• Loose teeth in advanced cases

• Jaw joint and muscle pain from overload

• More complex dentistry later because restorations keep failing under heavy forces

If you’ve had multiple chips or fractures, it’s usually not “bad luck” — it’s often a force problem.

5) Causes are usually multi-factorial

There isn’t one single cause for everyone. Common contributors include:

• Stress/anxiety and high mental load

• Sleep disruption (including snoring and possible obstructive sleep apnoea)

• Certain medications (ask your GP/pharmacist if you suspect a link)

• Caffeine/alcohol late in the day (for some people)

• Bite changes or dental work that coincides with symptom flare-ups (not always the cause, but sometimes a trigger)

• Habitual daytime clenching (often posture/screen-related)

A quick note on snoring/sleep apnoea

If we suspect a sleep-related breathing issue based on your history (snoring, gasping, daytime fatigue), we may suggest medical assessment. Sleep apnoea is a health issue well beyond teeth — and it’s worth taking seriously. However, we can also help with obstructive sleep apnoea by proving a mouthguard to not only protect the teeth, but to open the airway.

What to do next

None of this means grinding is automatically a big problem — plenty of cases are mild and easy to manage. But if a few of these sound familiar, it’s worth getting your bite and jaw checked rather than waiting for a cracked tooth to bring it to your attention.

• Curious what grinding actually does to your teeth over time, and how a night splint protects them? Read [What Tooth Grinding Does to Your Teeth].
• Want to know what day-to-day management actually looks like? Read [my own experience managing bruxism and TMD].
• For the full picture on TMD and jaw pain treatment, visit our Jaw Disorders page.

Book a consultation with our Brisbane CBD dental team if any of this sounds like you.