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Most people who grind their teeth at night have no idea they're doing it. It happens while you sleep, often without any memory of it in the morning. By the time most people find out, there's already been some level of damage done to their teeth, jaw, or both.
The tricky part is that the signs of teeth grinding are easy to brush off as unrelated. A headache here, some jaw soreness there. Over time though, the pattern becomes hard to ignore. Here are the five most common signs that you're grinding your teeth at night, and what to do about it.
What Is Teeth Grinding?
Teeth grinding, known clinically as bruxism, is the involuntary clenching, gnashing or grinding of the teeth. It most commonly happens during sleep, which is why most people aren't aware of it. Sleep bruxism is classified as a sleep-related movement disorder, and it's more common than most people realise. Estimates suggest anywhere from 8 to 31 percent of adults grind their teeth to some degree.
Bruxism can range from mild, occasional grinding that causes minimal damage, to severe nightly grinding that wears down teeth significantly over time and causes chronic jaw pain. The earlier it's identified, the easier it is to protect your teeth from further damage.
Sign 1: You Wake Up with Jaw Pain or Headaches
This is the most common and most telling sign. If you regularly wake up with a sore, tired or aching jaw, or with a dull headache concentrated around the temples, bruxism is one of the most likely causes.
When you grind your teeth during sleep, the muscles responsible for chewing and jaw movement are working overtime for hours at a time. By morning, those muscles are fatigued in the same way any muscle would be after prolonged use. The tension radiates upward into the temples and across the forehead, which is why the headaches that come with bruxism are so often mistaken for tension headaches or even migraines.
If the jaw soreness or headaches are consistently worse in the morning and improve as the day goes on, that pattern strongly suggests a sleep-related cause like bruxism.
Sign 2: Your Teeth Are Worn, Chipped or Sensitive
Healthy teeth have a natural rounded shape and a smooth biting surface. In people who grind their teeth regularly, the enamel on the biting surfaces gradually wears flat. If your back teeth look shorter or flatter than they used to, or your front teeth look shorter or more translucent at the edges, that's a sign of wear.
Chipping is also common, particularly on the front teeth, as the repeated lateral grinding motion creates stress fractures in the enamel over time. You might notice small chips appearing without any obvious cause.
Tooth sensitivity is another key sign. As enamel wears down, the underlying dentine becomes closer to the surface, making teeth more sensitive to hot, cold and sweet foods. If your teeth have become noticeably more sensitive without any obvious dental cause, grinding may be the reason.
Sign 3: Your Jaw Clicks, Locks or Feels Tight
The temporomandibular joint, or TMJ, is the hinge that connects your jaw to your skull. It's one of the most complex joints in the body and one of the most vulnerable to damage from bruxism.
Chronic grinding places enormous stress on the TMJ over time. The early signs are often subtle: a slight clicking or popping sound when you open or close your mouth, stiffness in the jaw first thing in the morning, or difficulty opening your mouth fully. Some people notice that their jaw feels like it needs to click or unlock before it moves freely.
Left untreated, TMJ dysfunction associated with bruxism can progress to more significant pain, limited jaw movement, and in severe cases, a jaw that temporarily locks open or closed. If you're experiencing jaw clicking or TMJ symptoms alongside grinding, it's worth speaking with a dentist — the right treatment depends on your specific situation, and a dentist can advise whether a night guard is appropriate and which type suits your bite.
Sign 4: Someone Has Heard You Grinding
Sleep bruxism can produce an audible grinding noise that's loud enough to wake a partner. It's described variously as a squeaking, scraping or grating sound. If a partner, family member or housemate has ever commented on hearing you grind your teeth at night, that's a direct confirmation of bruxism.
Not everyone who grinds their teeth makes a sound. Clenching, where the jaw is held tightly shut without movement, produces no noise but can cause the same damage to teeth and joints as active grinding. So the absence of any noise doesn't rule out bruxism.
Sign 5: You Clench During the Day
Daytime clenching is closely related to night bruxism and the two often occur in the same people. You might notice that you clench your jaw when concentrating, during stressful situations, while driving, or at your desk. Some people hold tension in their jaw so habitually that they don't notice it until they consciously check.
A useful exercise: take a moment right now to check whether your upper and lower teeth are touching. Unless you're eating or speaking, they shouldn't be. The teeth should rest slightly apart, with the tongue resting against the roof of the mouth. If your teeth are touching, or if your jaw feels tense, that's a sign of habitual clenching.
Daytime clenching is often stress-driven and can be reduced with awareness and habit changes. Night grinding is harder to control consciously, which is why a physical barrier like a night guard is the most reliable protective measure available.
What to Do If You Grind Your Teeth
If you recognise three or more of the signs above, there's a good chance you grind your teeth to some degree. Here's what to do:
Get a Custom Night Guard
A well-fitted night guard is the most effective way to protect your teeth from grinding damage. It creates a barrier between the upper and lower teeth, absorbs grinding forces, and reduces the pressure reaching your jaw joint. Jawology's custom night guards are made from dental-grade materials and fitted from at-home impressions, starting from $199.
Reduce Stress Where Possible
Stress and anxiety are the most common triggers for both daytime clenching and night grinding. Exercise, better sleep habits, and stress management techniques can all help reduce bruxism severity over time.
Avoid Caffeine and Alcohol Before Bed
Both caffeine and alcohol are associated with increased bruxism activity during sleep. Reducing intake, particularly in the few hours before bed, can help reduce grinding severity.
See a Dentist
If you suspect you've been grinding for some time, a dentist can assess the level of wear on your teeth and advise on the best course of action. They may recommend a night guard, and in some cases additional treatment for any damage already done.
Frequently Asked Questions
How do I know if I grind my teeth at night?
The most common signs are waking up with jaw pain or headaches, noticing worn or chipped teeth, jaw clicking or stiffness, hearing from a partner that you grind, and daytime jaw clenching. If you recognise several of these, it's worth getting a night guard and speaking to your dentist.
Can teeth grinding be cured?
There's no single cure for bruxism, but it can be managed effectively. A custom night guard protects your teeth from grinding damage. Stress reduction, avoiding caffeine and alcohol before bed, and in some cases muscle relaxant therapy or physiotherapy can help reduce the severity of grinding over time.
Is teeth grinding serious?
Mild grinding may cause minimal harm. Moderate to severe bruxism left untreated can cause significant enamel wear, tooth fractures, increased sensitivity, jaw pain, TMJ dysfunction, and chronic headaches. The longer it goes unaddressed, the more damage accumulates.
Can stress cause teeth grinding?
Yes. Stress and anxiety are the most commonly identified triggers for bruxism. People who experience high levels of stress or anxiety are significantly more likely to grind their teeth. Addressing stress through exercise, sleep hygiene, and relaxation techniques can help reduce grinding, though a night guard is still recommended to protect the teeth in the meantime.
Does a night guard stop teeth grinding?
A night guard doesn't stop the grinding reflex itself, but it protects your teeth and jaw from the damage grinding causes. It creates a barrier between the upper and lower teeth, absorbs grinding forces, and reduces the load on the jaw joint. For most people this is sufficient to prevent further damage and relieve morning jaw pain and headaches.
How quickly does grinding damage teeth?
It depends on severity. Mild grinders may show minimal wear over many years. Severe grinders can cause significant enamel damage within months. Because grinding happens during sleep, damage can accumulate gradually without obvious symptoms until it becomes significant. This is why protecting your teeth early with a night guard matters.
Stop Grinding. Start Protecting.
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