Teeth grinding, known clinically as bruxism, affects millions of people and can happen while you’re asleep or awake. Stopping it requires figuring out which type you have and what’s driving it, because the two forms have different triggers and respond to different strategies. The good news: most people can significantly reduce or eliminate grinding with the right combination of approaches.
Why You’re Grinding in the First Place
Bruxism isn’t a simple bad habit. The direct trigger comes from the central nervous system, specifically from differences in the neural pathways that control jaw-closing muscles. Disruptions in dopamine levels play a key role in these involuntary jaw movements, and dopamine fluctuations are closely tied to chronic stress. People with higher levels of anxiety and neuroticism tend to release emotional tension through clenching and grinding, often without realizing it.
There’s also a significant genetic component. Between 21% and 50% of people with sleep bruxism have a close family member who ground their teeth in childhood. If your parent or sibling was a grinder, you’re more likely to be one too.
Some grinding has a surprising underlying cause: sleep apnea. Nearly 50% of adults with obstructive sleep apnea also grind their teeth at night, far above the 8 to 13% rate in the general population. The leading theory is that grinding may actually be your body’s attempt to reopen a blocked airway. When your oxygen drops during an apnea episode, your brain triggers a brief arousal that increases muscle activity, including rhythmic jaw movements that push the lower jaw forward and help restore airflow. If you snore heavily, wake up feeling unrested, or have a partner who notices you stop breathing at night, sleep apnea may be the root of your grinding.
Certain medications can also trigger bruxism. SSRIs (common antidepressants like sertraline and fluoxetine) indirectly affect dopamine and are known to increase grinding. If your bruxism started or worsened after beginning a new medication, that connection is worth exploring with your prescriber.
Sleep Grinding vs. Daytime Clenching
Sleep bruxism typically involves rhythmic, repetitive jaw movements, sometimes with audible grinding sounds. It happens mostly during light sleep phases, including brief daytime naps. You may not know you’re doing it unless a partner tells you or you wake up with a sore jaw, dull headache, or worn-down teeth.
Awake bruxism looks different. It involves sustained clenching or pressing your teeth together, or bracing and thrusting your jaw during the day. It’s closely linked to concentration, stress, and emotional states. Many people catch themselves clenching during intense work, driving, or stressful conversations. The distinction matters because daytime clenching responds well to awareness-based strategies, while sleep grinding requires different tools since you can’t consciously control what happens while you’re unconscious.
Mouthguards and Splints
A night guard won’t stop you from grinding, but it protects your teeth from the damage grinding causes. Research on bite force shows why this matters: women who grind generate roughly 55% more bite force than non-grinders (about 812 newtons compared to 523), and men who grind produce about 33% more force (1,058 newtons compared to 794). That kind of sustained pressure, repeated night after night, cracks enamel, flattens tooth surfaces, and can damage dental work.
You have two main options. Over-the-counter guards are cheaper upfront, typically $20 to $40, but they come in standard sizes that often fit poorly. A bad fit makes them uncomfortable, which means you’re less likely to wear one consistently. They’re also thinner and wear out faster, so you’ll replace them more often. Custom-fitted guards from a dentist are molded to your exact bite. They cost more initially (usually $300 to $500) but last significantly longer, fit comfortably, and provide better protection. For most people who grind regularly, the custom option is more cost-effective over time.
A newer middle option: several companies now offer mail-order custom guards where you take an impression at home and send it to a lab. These typically run $100 to $200 and offer better fit than store-bought guards, though your dentist can’t check the fit in person.
Breaking the Daytime Clenching Habit
Biofeedback is one of the most effective tools for daytime grinding. Portable biofeedback devices monitor jaw muscle tension and deliver a signal (a tone or vibration) when you clench, training you to notice and release. In clinical use, patients wearing biofeedback units were “startled to discover how frequently they engaged in clenching or grinding.” That awareness alone is powerful. Studies show daytime bruxism can be markedly reduced through biofeedback training over periods as short as two to three weeks.
Even without a device, you can build your own awareness practice. Set random reminders on your phone throughout the day. When the reminder goes off, check your jaw: are your teeth touching? Is your jaw tight? The resting position for your mouth is lips together, teeth apart, tongue resting gently on the roof of your mouth. Practicing this “lips together, teeth apart” position repeatedly throughout the day helps reprogram the habit.
Stress management directly reduces grinding because of the dopamine-stress connection. Regular exercise, adequate sleep, and whatever form of stress reduction works for you (meditation, deep breathing, walking) can lower the baseline tension that drives clenching. Progressive muscle relaxation, where you deliberately tense and then release muscle groups including your jaw, can be especially helpful before bed.
Botox for Severe Grinding
When other approaches haven’t provided enough relief, injections that temporarily weaken the jaw muscles can reduce grinding force. The treatment targets the masseter muscles (the large muscles at the angle of your jaw) and sometimes the temporalis muscles at your temples. About half the dose goes into the masseters, with the rest split between the other muscles.
The effects typically last four to six months, so most people need injections two to three times per year. Doses vary significantly based on severity: mild cases require much smaller amounts than severe cases where the muscles have visibly enlarged from overuse. Women generally need lower doses than men due to differences in muscle mass.
This isn’t a first-line treatment, and it comes with tradeoffs. Some people experience temporary difficulty chewing tough foods, and long-term repeated use can cause some thinning of the jaw muscles. But for people with severe grinding that’s damaging their teeth or causing chronic pain, the relief can be substantial.
Address What’s Underneath
If your grinding is linked to sleep apnea, treating the breathing problem often reduces or eliminates the grinding. A sleep study can determine whether you have apnea. Treatment with a CPAP machine or a mandibular advancement device (a mouthpiece that holds your jaw forward to keep your airway open) addresses both problems at once.
If an SSRI or another medication triggered your bruxism, your prescriber may be able to switch you to a different medication less likely to cause grinding, or adjust your dose. This is one of the more straightforward fixes when it applies.
Misalignment of your bite can also contribute to grinding by creating uneven contact between upper and lower teeth, which affects how your jaw joint functions. A dentist can evaluate whether orthodontic treatment or adjustments to your bite might help.
A Practical Plan for Tonight
Start with the basics. Get a night guard to protect your teeth while you work on reducing the grinding itself. Practice the “lips together, teeth apart” resting position during the day. Cut back on caffeine and alcohol, both of which worsen grinding. Avoid chewing gum, which keeps your jaw muscles in a clenching-ready state.
Before bed, apply a warm washcloth to your jaw for five to ten minutes to relax the muscles. Stretch your jaw gently by opening your mouth wide, then slowly closing. Avoid screens and stimulating activities in the hour before sleep, since the arousal they create in your nervous system can carry over into sleep grinding.
If these steps don’t bring enough improvement after a few weeks, talk to your dentist about whether a custom splint, biofeedback, or evaluation for sleep apnea makes sense as a next step. Grinding is common and very treatable, but the right approach depends on what’s driving yours.