Teeth grinding, known clinically as bruxism, affects roughly 8% to 31% of adults depending on the type and how it’s measured. Stopping it depends on whether you’re grinding during the day, at night, or both, because the two forms have different triggers and require different strategies. The good news: most people can significantly reduce or eliminate grinding with a combination of habit changes, stress management, and targeted treatments.
Why You’re Grinding in the First Place
Daytime grinding is usually tied to emotions or concentration. Stress, anxiety, frustration, and even deep focus can cause you to clench your jaw without realizing it. It’s essentially an unconscious coping mechanism, and most people don’t notice they’re doing it until their jaw aches at the end of the day.
Nighttime grinding is a different animal. It’s classified as a sleep-related movement disorder, and it’s linked to brief disruptions in your sleep cycle. Your brain partially wakes up for a few seconds (a “microarousal”), and the jaw muscles activate in rhythmic bursts. These episodes tend to cluster during lighter stages of sleep. Stress and anxiety play a role here too. In one study of people with sleep bruxism, 68% had elevated anger symptoms, nearly 24% had moderate to severe anxiety, and about 18% showed signs of depression. The physical anxiety component, the kind you feel in your body rather than just your thoughts, had the strongest connection to nighttime grinding.
Conditions That Make Grinding Worse
Sleep apnea is one of the most overlooked causes. About half of adults with obstructive sleep apnea also grind their teeth, compared to roughly 8% to 13% of the general population. The connection makes physiological sense: when your airway collapses during an apnea episode, your brain triggers jaw movements that push the lower jaw forward, physically reopening the airway. Your body is essentially using grinding as an emergency tool to restore breathing. If you snore heavily, wake up gasping, or feel exhausted despite a full night’s sleep, treating the apnea may resolve the grinding on its own.
Certain antidepressants can also trigger grinding. SSRIs, particularly sertraline (Zoloft), have been linked to both jaw clenching and nighttime grinding. These medications work by altering serotonin levels, which in turn suppresses dopamine, a brain chemical involved in controlling muscle movement. If your grinding started shortly after beginning or changing an antidepressant, that connection is worth discussing with your prescriber. Adjusting the dose or switching medications often resolves it.
Daytime Strategies That Work
Stopping daytime grinding starts with catching yourself in the act. One simple technique: rest the tip of your tongue against the back of your upper front teeth. This position makes it physically impossible to clench or grind. Try placing small reminders around your workspace, a sticky note on your monitor, an hourly phone alarm, anything that prompts you to check your jaw position throughout the day.
When you notice tension building, try a deliberate clench-and-release cycle. Tighten your jaw muscles intentionally for five seconds, then slowly let go. This teaches your brain what a relaxed jaw actually feels like, since many chronic grinders have lost the ability to distinguish tension from their normal resting state. Gentle stretching helps too: slowly open your mouth as wide as you comfortably can, hold for a few seconds, and close. Repeat several times whenever you feel tightness creeping in.
Because daytime bruxism is so closely tied to stress, anything that lowers your baseline tension will help. Regular exercise, adequate sleep, and even brief breathing exercises during the day all reduce the stress load that drives clenching.
Nighttime Solutions
A custom-fitted mouthguard (your dentist may call it a night guard or occlusal splint) is the most common first-line treatment. It won’t stop you from grinding, but it prevents your teeth from making direct contact, protecting enamel, crowns, and dental work from damage. Over-the-counter versions exist, but a custom guard from your dentist fits better, lasts longer, and is less likely to shift your bite over time.
If a standard guard isn’t enough, your dentist may recommend a mandibular advancement device. This type of appliance holds your lower jaw slightly forward, which both opens the airway and changes the mechanical position of the jaw muscles. It’s especially useful if sleep apnea is part of the picture.
Biofeedback for Sleep Grinding
Biofeedback devices are a newer approach that aims to retrain your jaw muscles while you sleep. These devices detect clenching through sensors and deliver a mild stimulus, typically a small electrical pulse or vibration, that prompts your muscles to relax without fully waking you up.
The research is promising but still developing. After five consecutive nights of use, studies show meaningful reductions in grinding episodes. One trial found a 35% to 38% drop in muscle activity compared to baseline. Another reported a 48% to 51% reduction in grinding episodes per hour after six weeks. A third study found that grinding events dropped to roughly 45% of baseline levels on nights the device was used. The catch: long-term data is limited, and some of these gains may fade after treatment stops. Still, for people whose grinding resists other approaches, biofeedback offers a legitimate option.
Botox Injections for Severe Cases
For grinding that hasn’t responded to guards, stress management, or behavioral therapy, injections of botulinum toxin into the jaw muscles can dial down their activity. The injections target the masseter muscle (the thick muscle at the angle of your jaw) and sometimes the temporalis muscle (along the side of your head above your ear). By partially weakening these muscles, the force of grinding drops significantly.
Relief typically lasts about 12 weeks before the muscles regain full strength and another round is needed. The procedure takes just a few minutes and uses very fine needles. It’s particularly helpful for people who wake up with severe jaw pain or headaches, or whose grinding has started causing visible enlargement of the jaw muscles. This is generally reserved for cases where less invasive options haven’t worked.
The Role of Magnesium
Magnesium plays a direct role in muscle relaxation and nerve function. When levels are low, muscles are more prone to tension, spasms, and involuntary activity, exactly the kind of activity that drives grinding. While no large clinical trials have definitively proven that magnesium supplements cure bruxism, the connection between deficiency and muscle hyperactivity is well established. Many adults don’t get enough magnesium from diet alone. Foods rich in magnesium include dark leafy greens, nuts, seeds, and whole grains. A supplement in the range of 200 to 400 mg of magnesium glycinate before bed is a common recommendation, partly because this form also has mild calming effects that may improve sleep quality.
What Happens If You Don’t Address It
Grinding that continues unchecked for months or years can cause real damage. The most immediate risk is to your teeth: worn enamel, chipped or cracked teeth, flattened biting surfaces, and failed dental work. Over time, the constant strain on your jaw joint can lead to temporomandibular joint disorder. Symptoms include jaw pain, facial pain, headaches or migraines, clicking or popping sounds when you open your mouth, difficulty chewing, earaches, ringing in the ears, and neck or shoulder pain. In severe cases, the jaw can lock open or closed. Chronic grinding can also cause the masseter muscles to enlarge noticeably, changing the shape of your face.
The key takeaway is that grinding rarely resolves completely on its own, especially if the underlying cause persists. But it responds well to a layered approach: identify and address contributing factors like stress, sleep apnea, or medications, protect your teeth with a guard, and use targeted therapies to reduce muscle activity. Most people see significant improvement within a few weeks of starting treatment.