You wake up with a sore jaw, a dull headache behind your temples, and teeth that feel oddly tender. Nobody told you you were grinding. Your dentist did, at your last cleaning, after pointing to the worn-down edges of your back molars. Sound familiar? Nighttime teeth grinding (bruxism) is one of the most common things our dental team sees, and it generates a steady stream of questions from patients in South San Francisco and the surrounding Peninsula communities. We’ve gathered the ones we hear most and answered them honestly below.
What exactly is bruxism, and how do I know if I have it?
Bruxism is the clinical term for clenching or grinding your teeth. Sleep bruxism specifically happens while you’re unconscious, which is why most people have no idea they’re doing it until someone tells them — or until the damage shows up at a dental exam.
Common signs include:
- Dull headache or jaw soreness when you wake up
- Teeth that look flatter, shorter, or chipped at the edges
- Increased tooth sensitivity (especially to cold)
- Tight or tired jaw muscles, particularly in the morning
- A partner reporting grinding sounds at night
- Cheek tissue that feels rough or chewed on the inside
During a routine dental exam, your dentist can often spot the wear patterns and other signs of bruxism before you’re even aware of them. That’s one reason regular checkups matter so much — catching it early prevents more serious damage down the road.
Why do people grind their teeth at night?
There’s rarely one single cause. Research points to a mix of factors that can overlap in the same person. The American Dental Association identifies stress and anxiety as the most commonly cited contributors, but the picture is more complex than that:
- Stress and anxiety. The most well-documented trigger. Higher daytime stress often correlates with worse nighttime grinding.
- Sleep disorders. Sleep bruxism is classified as a sleep-related movement disorder. It’s associated with obstructive sleep apnea, snoring, and disrupted sleep stages.
- Bite misalignment. Teeth that don’t come together evenly can contribute to clenching habits.
- Stimulants. Caffeine (especially later in the day) and certain medications, including some antidepressants and ADHD medications, are linked to higher bruxism rates.
- Alcohol and tobacco. Both are associated with increased grinding activity during sleep.
- Genetics. Bruxism does tend to run in families, suggesting a hereditary component.
Understanding your likely triggers helps you and your dental team build a plan that actually addresses the root cause, not just the symptoms.
Can grinding teeth cause permanent damage?
Yes, over time it can. This is the part most people underestimate. Tooth enamel is the hardest substance in the human body, but it doesn’t regenerate once it’s gone. Sustained grinding applies a level of force that far exceeds normal chewing, and that adds up.
The potential consequences include:
- Enamel erosion and flattened cusps. Teeth lose their natural shape and protective coating, leading to sensitivity and a higher risk of decay.
- Cracked or fractured teeth. The repeated stress can cause teeth to crack, sometimes all the way to the root — which can require extraction.
- Worn-down restorations. Fillings, crowns, and veneers can break down much faster in a grinder.
- TMJ (jaw joint) problems. Chronic clenching puts stress on the temporomandibular joint, potentially leading to clicking, popping, pain, or limited jaw movement.
- Gum recession. The forces involved can accelerate gum tissue loss around teeth.
The encouraging part: caught early, most of this is preventable. A night guard and some lifestyle adjustments can put the brakes on damage before anything serious happens.
Do mouth guards actually work, and what kind do I need?
A dental mouth guard for teeth grinding is the most reliable way to protect your teeth while you and your dentist work on the underlying causes. It doesn’t stop the grinding reflex itself, but it creates a cushioning barrier that absorbs the force and prevents enamel-to-enamel contact. For many people, that’s enough to eliminate the morning headaches and halt the damage.
The key question patients ask is: store-bought or custom? Here’s the honest comparison:
| Type | Cost (national ballpark — not our office’s prices) | Fit | Durability | Best for |
|---|---|---|---|---|
| Over-the-counter boil-and-bite | $15–$50 | Generic; can feel bulky | Months (with heavy use, weeks) | Short-term or mild grinding |
| Mail-order custom (impression kit at home) | $100–$200 | Better than OTC; depends on impression quality | 6–18 months | Moderate grinding on a budget |
| Dentist-made custom guard | $300–$800+ | Precise; made from professional impressions | 2–5 years with care | Moderate to severe bruxism; best protection |
For anyone with significant wear, jaw pain, or existing dental work to protect, a dentist-made guard is worth the investment. The fit is far more accurate, the material is chosen to match your grinding severity, and it won’t create bite problems the way a poorly fitting OTC guard can.
At our South San Francisco office, we can also use our in-office SprintRay 3D printer to fabricate certain dental appliances with a high degree of precision and speed — a good example of how modern dental technology can make the process faster and more comfortable for patients.
What can I do at home to reduce grinding?
A night guard protects your teeth. But addressing the drivers of bruxism can genuinely reduce the grinding itself. None of these is a guaranteed cure, but each has evidence behind it:
- Wind down before bed. A consistent pre-sleep routine that avoids screens, alcohol, and intense activity in the hour before bed can reduce nighttime muscle tension. Studies in sleep medicine consistently link poor sleep hygiene to worse bruxism episodes.
- Cut caffeine after 2 p.m. Caffeine extends the lighter stages of sleep where bruxism episodes tend to happen.
- Jaw exercises and awareness during the day. Practice keeping your lips together and teeth slightly apart (not touching) during waking hours. Physical therapists and dentists sometimes teach jaw-stretching routines that reduce baseline muscle tension.
- Stress management. Cognitive behavioral therapy (CBT) has the strongest evidence base for reducing stress-related bruxism. Mindfulness, yoga, and regular aerobic exercise also help.
- Limit alcohol. Even moderate alcohol consumption is linked to increased grinding during sleep — the body processes it in ways that disrupt sleep architecture.
- Check your medications. If you started a new medication around the time grinding got worse, mention it to both your dentist and your prescribing doctor. Sometimes a simple adjustment makes a difference.
When should I see a dentist about teeth grinding?
As soon as you suspect it. There’s no reason to wait until a tooth cracks. Specifically, book an appointment if:
- You wake up with regular jaw soreness or headaches
- Your teeth feel sensitive in a way they didn’t before
- You can see wear or chipping on the biting edges of your teeth
- A partner says they can hear you grinding at night
- You have a clicking or popping jaw
- You grind your teeth and also snore or feel unrested in the morning (this may signal sleep apnea, which deserves its own evaluation)
At your visit, your dentist can assess the extent of wear, check for any related TMJ issues that need treatment, and take X-rays if needed. Speaking of X-rays: our office uses Pearl AI, an FDA-cleared artificial intelligence system that assists our dentists in reviewing dental X-rays. It can flag subtle changes in tooth structure and bone that are easy to miss on a quick look, which matters a lot for catching early grinding-related damage.
If my teeth are already worn down, what can be done to repair them?
Quite a lot, depending on the severity. Your dentist will start by getting the grinding under control first (because restoring worn teeth without addressing bruxism just means the new restorations get worn down too). Then the repair options depend on how much damage has occurred:
- Dental bonding. For minor chipping or slight wear, cosmetic dental bonding can rebuild tooth shape quickly and without drilling. It’s a cost-effective first step for mild cases.
- Crowns. For teeth that are more significantly worn, cracked, or structurally compromised, a crown protects what’s left of the tooth and restores full function. Our office uses CEREC technology to mill ceramic crowns in a single visit, so you’re in and out the same day without a temporary crown or a second appointment.
- Veneers. When multiple front teeth have lost shape and length due to grinding, porcelain veneers can restore a natural look. These are typically considered only after grinding is well-managed.
- Full-mouth rehabilitation. In severe, long-standing cases, a comprehensive plan rebuilding multiple teeth may be the path. This is customized, takes multiple appointments, and is planned carefully with your dental team.
The earlier grinding is caught and controlled, the simpler and less expensive the repair tends to be. This is genuinely one of those “a stitch in time” situations in dentistry.
Ready to protect your teeth and get some relief?
Our South San Francisco dental team can assess your grinding, fit you with a custom night guard, and check for any wear that needs attention. Getting ahead of it is always easier than repairing the damage later.
Written by the Vaksman Dental Group team and medically reviewed by Dr. Irena Vaksman, DDS — South San Francisco. Last reviewed August 2026.