You may need a night guard if you wake up with jaw soreness, morning headaches, tooth sensitivity, flattened teeth, chipped dental work, or a partner hears you grinding at night. The National Institute of Dental and Craniofacial Research says bruxism can lead to damaged teeth, jaw tiredness, and headaches, while Mayo Clinic notes that sleep bruxism is a sleep-related movement disorder that often goes unnoticed until problems show up. That is why this issue sneaks up on so many people.
At American Dental Group, we see patients in West Covina who assume they just sleep "a little tense" or think their headaches come from stress alone. Then we spot the telltale pattern: worn edges, sore jaw muscles, cracked enamel, or crowns taking more bite pressure than they should. Teeth grinding is not always dramatic. Sometimes it is quiet, steady damage that adds up month after month.
This guide breaks down the signs of bruxism, what tends to cause it, when a custom night guard makes sense, and when you need a deeper evaluation instead of just buying a guard online and hoping for the best.
What Bruxism Actually Looks Like
Bruxism is the habit of grinding, clenching, or gnashing your teeth. NIDCR describes it as a condition that can happen while you are awake or asleep, and its March 2025 patient guidance notes that many cases are mild while severe cases can damage teeth and cause jaw pain. Cleveland Clinic makes a useful distinction too: awake bruxism is often tied to stress or concentration, while sleep bruxism tends to do more damage because you cannot control it in the moment.
Mayo Clinic adds another important detail: people who grind during sleep are more likely to have other sleep-related issues, including snoring and pauses in breathing associated with sleep apnea. That does not mean every grinder has sleep apnea. It does mean persistent night grinding deserves a real look rather than a shrug.
6 Common Signs You May Need a Night Guard
The symptoms are not identical for everyone, but a few patterns show up again and again.
1. Morning jaw soreness or tightness
NIDCR lists soreness, tightness, and tiredness in the jaw muscles among common signs of bruxism. If your jaw feels worked over before breakfast, your muscles may have been clenching all night.
2. Frequent headaches, especially at the temples
Mayo Clinic specifically mentions a dull headache starting at the temples. Patients often describe it as a tension headache that is worse when they first wake up and eases later in the day.
3. Worn, flattened, chipped, or sensitive teeth
NIDCR and Mayo Clinic both flag flattened, chipped, cracked, or sensitive teeth as classic red flags. The wear can be subtle at first. Then one day the edges look shorter, the front teeth feel thinner, or cold water starts to sting.
4. Broken fillings, crowns, or other dental work
Heavy clenching does not just stress natural teeth. Mayo Clinic notes that severe bruxism can damage fillings, crowns, and other repairs. If you already invested in restorative work like a dental crown, untreated grinding can shorten its life.
5. Clicking, facial pain, or trouble opening comfortably
Cleveland Clinic includes sore jaw muscles, pain when eating, and difficulty opening and closing the mouth among common symptoms. Sometimes patients think they have a "TMJ problem" when the bigger story is that bruxism has been overloading the joint and surrounding muscles.
6. Someone hears you grinding at night
That may sound obvious, but it matters. Mayo Clinic notes that teeth grinding can be loud enough to wake a sleep partner. If someone tells you they hear it, believe them. That is useful diagnostic information, not background noise.
Quick reality check
If you have two or three of these signs together, especially jaw tightness plus worn teeth or headaches, it is worth getting checked before the habit starts costing you enamel or dental work.
What Causes Teeth Grinding at Night?
There usually is not one single cause. Mayo Clinic says bruxism likely comes from a mix of physical, mental health, and genetic factors. NIDCR points to stress, mood, distress, alcohol, caffeine, smoking, certain medications, and family history as contributors. Its March 2025 expert Q&A adds anxiety, depression, coffee, alcohol, smoking, and some mental health medications to the list as well.
That is why night guards are often part of the answer, not the whole answer. If stress is driving daytime clenching, awareness and behavior change matter. If poor sleep quality is part of the picture, the right next step may include sleep medicine referral, especially if grinding comes with loud snoring or gasping.
When a Custom Night Guard Helps Most
A custom night guard helps most when the goal is protecting the teeth and calming the load on the jaw. NIDCR says mouth guards separate the teeth, help prevent tooth damage, and may reduce muscle activity from clenching and grinding. Cleveland Clinic similarly notes that a custom mouth guard can protect teeth and place the jaw in a more favorable position to reduce jaw muscle strain.
That protection matters if you already have enamel wear, cracked edges, jaw soreness, or a history of damaged restorations. It also matters if you recently completed treatment like root canal therapy, veneers, or crowns and want to keep that work from taking extra stress at night.
A store-bought guard can be a temporary bridge, but it is not always the right long-term answer. A custom guard is designed around your bite, your tooth positions, and the amount of protection you actually need. That usually means better comfort, better retention, and fewer surprises when you wake up.
When a Night Guard Is Not the Whole Story
A night guard can protect teeth, but it does not diagnose every cause of jaw pain. If your symptoms include persistent clicking, locking, ear-area pain, severe morning headaches, facial pain, or signs of airway issues during sleep, the problem may be bigger than grinding alone.
NIDCR notes that a sleep study may be recommended to confirm sleep-related bruxism or identify related conditions. Mayo Clinic also points out the overlap between sleep bruxism and sleep disorders such as sleep apnea. If the pattern suggests that kind of issue, we would rather catch it early than keep treating the damage while missing the driver behind it.
Sometimes what looks like "I need a night guard" turns out to be a cracked tooth, a bite interference, or dental work that is already failing under pressure. In that situation, protecting the teeth is still useful, but it needs to happen alongside the right treatment plan.
What to Do If You Think You Grind Your Teeth
Start with an exam. NIDCR says dentists can check for tooth wear, damaged restorations, and jaw muscle tenderness, then recommend treatment based on what they find. That is the best first move because it tells you whether you are dealing with mild wear, active bruxism, or a more complex bite or sleep issue.
- Get evaluated before more enamel is lost. Wear does not grow back.
- Keep regular cleanings and exams. They help catch the pattern early.
- Cut back on evening triggers when relevant. NIDCR specifically calls out caffeine, alcohol, and smoking.
- Pay attention to stress habits during the day. Many people clench while driving, lifting, or working without realizing it.
- Do not ignore damaged dental work. If you already chipped a filling or crown, that is a signal.
If we confirm that bruxism is part of the picture, treatment may include a custom night guard, bite monitoring, repairs to worn or cracked teeth, or referral when sleep-related issues need a closer look. The goal is not just to stop a noise at night. The goal is to prevent small signs from turning into bigger, pricier problems later.
Night Guards for Teeth Grinding in West Covina
If you wake up with a tight jaw, recurring headaches, sensitive teeth, or the feeling that you are wearing your smile down faster than you should, it is worth having the pattern checked. At American Dental Group, we help patients in West Covina, Covina, Baldwin Park, El Monte, Rowland Heights, La Puente, and Hacienda Heights figure out whether they need a custom night guard, bite adjustment, restorative repair, or a deeper sleep-related evaluation.
If you think grinding is starting to affect your teeth, call (626) 337-7271 or use our online appointment form. Protecting your enamel early is easier than rebuilding damage later.
Frequently Asked Questions
How do I know if I need a night guard?
You may need a night guard if you wake up with jaw soreness, morning headaches, tooth sensitivity, flattened teeth, chipped dental work, or if a partner hears you grinding at night. A dentist can confirm whether bruxism is the likely cause.
Will a night guard stop teeth grinding completely?
A night guard does not always stop the clenching or grinding habit itself, but it can protect your teeth from damage and may reduce muscle strain. In many cases, that protection is the main reason it is recommended.
Is a custom night guard better than a store-bought one?
A custom night guard usually fits more precisely, feels more comfortable, and is more predictable for long-term wear than a store-bought option. Generic guards can work as a short-term bridge, but they are not ideal for every bite.
Can teeth grinding damage crowns or fillings?
Yes. Bruxism can damage teeth, fillings, crowns, and other dental work over time. Heavy grinding can chip restorations, create bite strain, and shorten the life of existing treatment.
What causes teeth grinding at night?
Teeth grinding can be linked to stress, anxiety, sleep-related arousals, caffeine, alcohol, smoking, certain medications, and other sleep problems such as sleep apnea. Often, more than one factor is involved.
When should I see a dentist about bruxism?
You should see a dentist if jaw pain, headaches, tooth sensitivity, clicking, worn teeth, or broken dental work keep showing up. The sooner bruxism is identified, the easier it is to limit long-term damage.