Bruxism

Bruxism (Teeth Grinding & Jaw Clenching)

Bruxism refers to repetitive jaw-muscle activity i.e. clenching or grinding the teeth. Bruxism can happen during sleep or while awake, and it may contribute to jaw pain, headaches, tooth wear, and enlargement of the chewing muscles (masseters).

 

In the context of skin longevity, jaw muscles and lower face are part of the facial biomechanics that influence comfort, function, and facial balance over time. Hence, bruxism and treatment of this condition should be measured, and personalised.

What is Bruxism?

Modern consensus distinguishes two related behaviours:

 

  • Sleep bruxism: masticatory muscle activity during sleep that can be rhythmic (phasic) or sustained (tonic). 
  • Awake bruxism: clenching or bracing the jaw during wakefulness, often linked to stress, concentration, or habit patterns (and sometimes coexists with sleep bruxism). 

 

Many people clench occasionally. It becomes a condition we treat when it causes pain, dental damage, headaches, muscle fatigue, TMJ symptoms, or significant quality-of-life impact.

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Why does bruxism occur?

Bruxism is multifactorial. For many people, it’s driven by a combination of:

 

  • Central nervous system arousal / sleep-related factors
  • Stress, habit loops, and muscle bracing 
  • Contributing medical/dental factors (bite issues, jaw joint loading, airway/sleep-disordered breathing in selected patients)


What does bruxism look like?

 

  • Waking with a tight jaw, facial muscle fatigue, or temple ache
  • Morning headaches
  • Tooth wear, cracks, or “flattened” biting surfaces (often noticed by dentists)
  • Jaw clicking, tenderness, or limited opening 
  • Enlarged “square jaw” appearance from masseter hypertrophy in some individuals


Sleep bruxism has been observed frequently in some populations with obstructive sleep apnoea (OSA), which is one reason clinicians may screen for snoring, daytime sleepiness, and unrefreshing sleep when symptoms suggest it.

Risk factors and triggers

Triggers differ slightly for awake vs sleep bruxism, but common factors include:

  • Stress / anxiety, intense concentration, high cognitive load 
  • Stimulants (e.g., caffeine or nicotine) in sensitive individuals
  • Alcohol 
  • Poor sleep quality or sleep disruption
  • Certain medications 
  • Possible association with sleep-disordered breathing in a subset of patients

Types of bruxism

 

Clinically, we categorise bruxism by:

 

1) Timing

  • Awake bruxism
  • Sleep bruxism 


2) By clinical relevance

  • Bruxism behaviour 
  • Bruxism with consequences (pain, damage, dysfunction)

Signs and symptoms of bruxism

 

You may benefit from evaluation if you have:

  • Recurrent jaw/temple pain or tightness, especially on waking
  • Frequent headaches (particularly temple region)
  • Tooth sensitivity, chips, cracks, or rapid tooth wear
  • Jaw joint clicking, locking, or pain (TMJ symptoms)
  • Sleep partner reports grinding sounds
  • Facial muscle enlargement or “bulky” masseters with clenching history

 

If you have night sweats, loud snoring, choking or gasping in sleep, or significant daytime sleepiness, it’s worth screening for sleep disorders as part of a complete plan.

 

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FAQs

Why does bruxism occur?

Bruxism is due to abnormal muscle and nervous-system signalling:

 

  • Awake bruxism often behaves like a habitual muscle-bracing pattern, reinforced during stress, focus, or emotional load. 
  • Sleep bruxism is linked to sleep micro-arousals and autonomic activation in some individuals; it may co-occur with other sleep disturbances. 


Over time, repeated high-force contraction can lead to:

 

  • Muscle pain and trigger points
  • Tooth wear and fractures
  • Jaw joint overload in susceptible individuals
  • Masseter hypertrophy, which can also change lower-face contour

How can bruxism be treated?

Bruxism treatment is most effective when it targets (1) protection, (2) symptom reduction, and (3) trigger control.

 

1) Diagnosis first (because not all jaw pain is bruxism)


A structured evaluation typically includes:

 

  • Symptom timeline 
  • Jaw function exam 
  • Review of dental signs 
  • Sleep screening if indicated 


2) Dental protection 


Occlusal splints or night guards are widely used to help protect teeth and reduce damage and noise. These oral devices do not eliminate the activity of clenching in all patients.
 

3) Behavioural and muscle-retraining strategies 

 

  • Awareness training 
  • Stress downshifting and sleep hygiene
  • Physiotherapy strategies 


4) Botulinum toxin for selected patients 


For patients with significant masseter overactivity, pain, or hypertrophy, botulinum toxin injections into jaw-closing muscles may reduce contraction force and muscle-related pain.

 

What the evidence suggests overall:

 

  • Many studies report improvements in pain and muscle symptoms.


5) Treat contributing conditions

If signs point to sleep-disordered breathing or other medical contributors, addressing those can be a key part of long-term control in appropriate patients.

Why choose Dr Rachel Ho and The Skin Longevity Clinic for bruxism treatment in Singapore?

At The Skin Longevity Clinic, bruxism is managed comprehensively as bruxism is affected by the biomechanics of medical conditions and lifestyle triggers.

 

What patients can expect:

 

  • Clear, objective explanation of whether this is likely awake bruxism, sleep bruxism, TMJ-related pain, or a combination  
  • Evidence-based, stepwise planning: protection first, symptom control next, and prevention strategies tailored to your triggers. 
  • Conservative, anatomy-respectful dosing when injectables are used—focused on function, comfort, and long-term facial balance.
  • Collaborative care mindset: when needed, we coordinate with your dentist or sleep physician because bruxism can sit at the intersection of dental wear, muscle overload, and sleep quality.

Doctor Rachel’s Takeaway

Bruxism is a jaw-muscle activity disorder that can become clinically important when it causes pain, dental damage, headaches, or facial muscle hypertrophy. 

The best results for treating bruxism come from:

  1. Accurate classification  
  2. Teeth protection when indicated 
  3. Screening for sleep contributors when symptoms suggest them 

If you’re dealing with jaw tension, headaches, or tooth wear in Singapore, early assessment can prevent years of cumulative damage and help you function better.