Bruxism is chronic, involuntary grinding or clenching of teeth. It usually occurs during sleep, but it may also occur while awake.
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The exact cause of bruxism is unknown, but it is believed to be related to:
anxietyAbnormal alignment of the teeth or jaws
Risk factors that increase your chance of getting bruxism include: Chronic stress or
anxietyAggressive or competitive personalitySmoking tobacco or drinking caffeinated beverages
Post-traumatic stress disorderAge: 40 or younger; especially common in women aged 27-40Family member with bruxismFacial or oral traumaUse of psychiatric medications, especially antidepressantsPrior serious head injuryComplication resulting from a disorder, such as Huntington's disease or Parkinson's disease
Symptoms may include: Grinding sounds during sleepTeeth that are sensitive to heat, cold, or brushingTense facial or jaw musclesTeeth that are worn down, flattened, fractured or chippedHairline cracks or wearing of the enamel on some teethSore teeth
Inflammation of the gums (gingivitis)
Headache, especially when waking in the morningDamage to the inside of the cheek (from biting or chewing)Temporomandibular joint disorder
The doctor or dentist will ask about your symptoms and medical history. An examination of your teeth and jaw will be done. With bruxism, teeth will have flattened tips, excessive wear, thin enamel, or sensitivity. X-rays may be done to check for further damage to your teeth or the underlying bone.
Methods of treatment include:
Your dentist may recommend: A protective mouth appliance, such as a night guard. It can absorb the pressure of constant night grinding.Correction of misaligned teeth if your bruxism might be caused by this.
Medication is only recommended for short-term use. Medications may include: Muscle relaxants before sleepMild sleeping aidsInjection of botulinum toxin (Botox) in severe cases if other treatment not working
Bruxism that is not
may result in gum damage, tooth loss, and jaw-related disorders.
The same methods used to treat bruxism can be used to prevent the condition.
Avoid caffeine drinks in the evening
Make sure to see your dentist regularly for check-ups
Bruxism. University of Virginia Health System website. Available at:
http://uvahealth.com/services/dentistry/conditions-treatments-1/11995/?searchterm=bruxism. Accessed January 22, 2013.
Chang H. Botulism toxin: use in disorders of the temporomandibular joint.
Dent Today. 2005;24:48,50-51.
Tan EK, Jankovic J. Treating severe bruxism with botulinum toxin.
J Am Dent Assoc. 2000;131:211-216.
Teeth grinding. American Dental Association's Mouth Healthy website. Available at:
http://www.mouthhealthy.org/en/az-topics/t/teeth-grinding.aspx. Accessed January 22, 2013.
Bruxism/teeth grinding. Mayo Clinic website.
Available at: http://www.mayoclinic.com/health/bruxism/DS00337/DSECTION=causes. Accessed August 30, 2013.
Last reviewed September 2013 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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