Sleep Bruxism (Teeth Grinding)
Reviewed by our editorial team
Last updated: 2026-04-01
Sleep bruxism is a condition in which you grind, gnash, or clench your teeth during sleep. It is considered a sleep-related movement disorder. Because people with sleep bruxism are more likely to have other sleep disorders, such as snoring and sleep apnea, it is often viewed as part of a larger sleep health picture.
While many people occasionally grind their teeth, chronic sleep bruxism can lead to significant dental damage, jaw pain, headaches, and sleep disruption. Because it occurs during sleep, many people are unaware they are doing it until a dentist notices worn enamel or a partner hears the grinding sound at night.
The Root Causes: Stress and Anatomy
Stress and anxiety are the most significant triggers for sleep bruxism. When the body is under stress, the nervous system becomes hyperactive, leading to increased muscle tension in the jaw during sleep. This is often a 'venting' mechanism for subconscious tension.
Anatomical factors, such as an abnormal bite (malocclusion) or missing teeth, can also contribute. Additionally, lifestyle factors like caffeine, alcohol, and smoking are known to increase the frequency and intensity of grinding episodes by interfering with sleep architecture.
Symptoms and Complications
Common signs include teeth that are flattened, fractured, or chipped; worn tooth enamel that exposes deeper layers; and increased tooth sensitivity. You may also wake up with a dull headache starting in the temples or soreness in the jaw (TMJ) muscles.
Long-term, untreated bruxism can lead to Temporomandibular Joint (TMJ) disorders, which cause chronic pain and clicking in the jaw. In severe cases, the grinding can be loud enough to wake a sleep partner, much like snoring.
The Link to Sleep Apnea
Research has shown a strong correlation between sleep bruxism and Obstructive Sleep Apnea (OSA). It is theorized that clenching the jaw is the body's way of trying to keep the airway open during an apnea event. When the airway collapses, the jaw muscles contract to stabilize the throat.
If you have both bruxism and daytime sleepiness or loud snoring, it is crucial to be screened for sleep apnea. Treating the apnea often causes the teeth grinding to stop or significantly decrease.
Protection and Treatment
The most common treatment is a night guard or occlusal splint. These are custom-made plastic appliances that fit over your teeth to protect them from the pressure of grinding. While they don't stop the grinding behavior, they prevent further dental damage and reduce jaw muscle strain.
Other approaches include stress-reduction techniques like meditation or CBT, and physical therapy for the jaw muscles. In some cases, muscle relaxants or Botox injections into the masseter muscles may be used to reduce the strength of the clenching.
When to Speak With a Doctor
See your dentist if your teeth are worn or sensitive, or see a sleep doctor if you have jaw pain along with daytime sleepiness.
Frequently Asked Questions
References
- [1]American Dental Association. Teeth Grinding (Bruxism).
- [2]Mayo Clinic. Bruxism (Teeth Grinding): Symptoms and Causes.
- [3]Sleep Foundation. Bruxism and Sleep.
The information on this page is for educational purposes only and is not a substitute for professional medical advice. Always consult a qualified healthcare provider for diagnosis and treatment.