What Is Bruxism?
Bruxism is the medical term for grinding, clenching or gnashing your teeth, and it is far more common than most people realise. It can happen during the day (awake bruxism) or at night while you sleep (sleep bruxism), with the nighttime version being particularly problematic because you are usually completely unaware it is happening.
It is estimated that around 8-13% of adults experience sleep bruxism, though the actual number may be higher since many people don't know they grind their teeth until a partner mentions it or a dentist spots the signs. If you have ever woken up with a sore jaw, a dull headache or sensitive teeth, bruxism could be the cause.
What Causes Teeth Grinding at Night?
The exact cause of sleep bruxism is not fully understood, but research points to several contributing factors that often work together.
Stress and Anxiety
This is widely considered the most common trigger. When you carry stress and tension into the night, your jaw muscles can unconsciously clench and grind as a physical expression of that unresolved tension. People going through stressful life events, work pressure or emotional difficulties often experience bruxism for the first time or notice existing grinding getting worse.
Sleep Disorders
Bruxism is frequently associated with other sleep conditions, particularly obstructive sleep apnoea. Research suggests that grinding episodes often occur at the end of an apnoea event, as the body partially rouses to restore normal breathing. If you grind your teeth and also snore heavily or experience daytime fatigue, it is worth discussing the possibility of sleep apnoea with your doctor.
Lifestyle Factors
Several lifestyle factors can increase the likelihood of bruxism. These include high caffeine intake, alcohol consumption (particularly in the evening), smoking and the use of certain medications, especially some antidepressants. Recreational drugs like ecstasy and amphetamines are also strongly linked to teeth grinding.
Bite and Jaw Alignment
An abnormal bite (malocclusion) or misaligned jaw can contribute to bruxism, though this is less common than stress-related causes. If your dentist suspects alignment issues, they may refer you to an orthodontist for assessment.
Genetics
Bruxism tends to run in families. If your parents or siblings grind their teeth, you are more likely to as well. This genetic component suggests that some people may simply be predisposed to the condition.
Signs You Might Be Grinding Your Teeth
Since sleep bruxism happens unconsciously, many people don't realise they do it. Here are common signs to watch for.
Jaw pain or stiffness: Particularly noticeable when you first wake up. Your jaw muscles may feel tired, tight or sore.
Headaches: Dull, tension-type headaches that start in the temples are common in people who grind their teeth at night.
Tooth sensitivity: Grinding wears down tooth enamel over time, exposing the more sensitive layers underneath. You may notice increased sensitivity to hot, cold or sweet foods.
Worn, flattened or chipped teeth: Your dentist is often the first person to spot signs of bruxism during a routine check-up.
Ear pain: Because of the proximity of the jaw joint to the ear canal, bruxism can cause pain that feels like it is coming from the ear.
Disrupted sleep: You or your partner may notice grinding sounds during the night, or you may wake feeling unrested despite getting enough hours of sleep.
"I had no idea I was grinding my teeth until my dentist pointed out the wear. Once I started paying attention, I realised the morning headaches and jaw pain I'd been ignoring for months were all connected." - Michael R., Ipswich
Treatment and Management Options
Mouthguards and Splints
A custom-fitted mouthguard (also called a night guard or occlusal splint) is the most common treatment for sleep bruxism. Worn over the teeth during sleep, it creates a barrier that prevents direct tooth-on-tooth contact, protects enamel and can help reduce jaw muscle strain. Custom guards from your dentist provide the best fit and protection, though over-the-counter options are available as a more affordable starting point.
Stress Management
Since stress is the primary trigger for most people, addressing it directly can significantly reduce grinding. Techniques like yoga and stretching before bed, deep breathing exercises, meditation and progressive muscle relaxation can all help lower the tension you carry into the night.
Sleep Hygiene Improvements
Improving your overall sleep quality can reduce bruxism episodes. A consistent bedtime routine, a dark and cool bedroom, limiting caffeine and alcohol in the evening, and putting away screens well before bed all contribute to calmer, more restful sleep.
Jaw Exercises and Physiotherapy
Specific exercises can help relax the jaw muscles and improve the range of motion in the temporomandibular joint (TMJ). A physiotherapist experienced in jaw conditions can teach you exercises and massage techniques to relieve tension. Simple practices like consciously relaxing your jaw throughout the day and keeping your lips together but teeth slightly apart can also help retrain the muscles.
Professional Treatment
In more severe cases, your dentist or doctor may recommend additional treatments such as muscle relaxant medication, Botox injections to the jaw muscles (which reduces their ability to clench forcefully) or referral for cognitive behavioural therapy to address the underlying anxiety or stress.
"Getting a proper night guard from my dentist was a game-changer. My jaw pain disappeared within a week and my partner says the grinding sound has stopped completely." - Olivia S., Launceston
When to See a Professional
Occasional teeth grinding is common and usually not a cause for concern. However, you should see your dentist or GP if you experience persistent jaw pain or stiffness, notice visible wear or damage to your teeth, have frequent morning headaches, or if a partner reports loud or frequent grinding sounds during the night.
Early intervention can prevent long-term damage to your teeth, jaw and sleep quality. The sooner bruxism is identified and managed, the better the outcomes tend to be.
Looking After Your Jaw and Your Sleep
Bruxism is a common condition that often goes unrecognised, but it is very treatable. Whether through a mouthguard, stress management, better sleep habits or professional treatment, there are effective solutions available. Taking care of your jaw is an important part of taking care of your overall sleep health, and it starts with being aware of the signs.
