A lot of people grind or clench their teeth without ever realizing it — often in their sleep, or quietly during a stressful workday. The clinical name is bruxism, and it’s remarkably common: research suggests it affects roughly one in five people at some point. In small doses it’s harmless, but sustained grinding and clenching can wear down teeth, crack fillings, and leave your jaw aching. Here’s how to recognize it and protect your smile.
What Is Bruxism?
Bruxism is the habit of grinding, gnashing, or clenching your teeth. It comes in two forms. Sleep bruxism happens at night, entirely outside your awareness, and is considered a sleep-related movement behavior. Awake bruxism is the daytime clenching or bracing of the jaw that many people do when they’re concentrating, stressed, or tense — often without noticing. You can have one or both, and because so much of it is unconscious, many people first learn about it from a partner who hears the grinding or from their dentist, who sees the wear.
What Causes Teeth Grinding?
Bruxism doesn’t have a single cause. Today it’s understood as a largely centrally driven behavior — originating in the brain and nervous system rather than in the way your teeth fit together, as was once believed. The most commonly recognized contributors include:
- Stress and anxiety — emotional tension is one of the strongest links, particularly for daytime clenching.
- Sleep factors — sleep bruxism is tied to brief arousals during sleep, and it frequently occurs alongside snoring and sleep apnea.
- Lifestyle — caffeine, alcohol, tobacco, and some recreational drugs can increase grinding.
- Medications — certain antidepressants and stimulants list bruxism as a side effect.
- Age — grinding is especially common in children and often eases as they grow.
Why It’s Worth Taking Seriously
Occasional grinding won’t harm your teeth, but a persistent habit can. Over time, bruxism wears down and flattens the biting surfaces, chips enamel, and can crack teeth or break fillings and crowns — which is why protecting existing dental work matters if you grind. It also strains the muscles and joints of the jaw, leading to soreness, tension headaches (often felt at the temples in the morning), earaches, and jaw stiffness or clicking. Left unchecked, chronic clenching is a recognized risk factor for temporomandibular joint (TMJ) problems.
Signs You Might Be Grinding
Because it’s so often silent, watch for these clues:
- A dull headache or sore jaw when you wake up
- Teeth that look flattened, chipped, or increasingly sensitive
- Aching facial muscles, or jaw that clicks or feels tight
- A partner who notices grinding sounds at night
- Indentations on the tongue or a lining of ridges inside the cheek
How to Protect Your Teeth
The good news is that bruxism is very manageable. The most effective protection is a custom night guard — a comfortable, professionally fitted appliance that cushions your teeth and absorbs the force of grinding, preventing wear and easing muscle strain. (A dentist-made guard fits far better and lasts far longer than a drugstore version.) Alongside that, it helps to manage stress with relaxation techniques or exercise, cut back on caffeine and alcohol especially in the evening, become aware of daytime clenching and consciously relax your jaw, and treat any underlying sleep issues. If snoring or disrupted sleep is part of the picture, addressing it can reduce grinding too.
How We Can Help
At Fridman Family Dental Care, we can tell you whether grinding is affecting your teeth — often before you feel it — by spotting the characteristic wear during a routine exam. We’ll fit a custom night guard, repair any damage, and, when needed, help you connect the dots to stress or sleep-related causes. For a closer look at how grinding, the jaw joint, and sleep are linked, see our clinical review of bruxism and temporomandibular disorders.
When to See Us
If you’re waking with a sore jaw or headaches, noticing worn or sensitive teeth, or your partner has mentioned nighttime grinding, it’s worth a visit — catching bruxism early prevents the expensive damage it can cause. If you’re new to our practice, here’s what to expect as a new patient. Call Fridman Family Dental Care in Valencia, CA at (661) 254-3700 or request an appointment online, and we’ll help you protect your smile.
