Open-Mouth Breathing and Your Child’s Oral Health

Open-Mouth Breathing and Your Child’s Oral HealthHave you noticed that your child is a mouth breather, even without a cold or stuffy nose? Although this may not seem to be cause for concern, chronic open-mouth breathing can be a sign of sleep-disordered breathing and other conditions that can significantly impact your child’s oral health.

Sleep Disordered Breathing

Sleep disorder breathing includes a spectrum of disorders including snoring, loud breathing, open-mouth breathing and sleep apnea. These conditions are often overlooked and left untreated. However, in many cases, they are signs of changes in your child’s health. Continuously breathing through the mouth instead of the nose can impact your child’s oral health and is a common cause of dental irregularities within children. We encourage parents to check for signs of mouth breathing and snoring so that we can begin treatment promptly.

The importance of treatment

The jaw and tongue are used primarily for eating, speaking, and swallowing. When incorporated into the breathing process repeatedly, posture begins to be altered. This can be important as a majority of children’s craniofacial growth occurs between birth and the age of 12. Chronic mouth breathing can pull the jaw and tongue into lower positions leading to facial malformation, malocclusions, and compromised airways.


Open mouth breathing is often an indication of a problem within the nasal passageway. Children may not be able to recognize this as a problem as they do not understand the risks it can pose to their growth and development. Common causes of open-mouth breathing can include allergies, chronic nasal congestion, inflamed sinus tissue, and a deviated septum. All these conditions can make it difficult to breathe through the nose, resulting in open-mouth breathing.


Though open-mouth breathing may seem harmless, as a long-term habit it can lead to health issues such as:

  • Bruxism or teething grinding
  • Crowded teeth
  • Daytime drowsiness
  • Dry mouth
  • Irregular bite
  • Jaw pain
  • Morning headaches
  • Poor facial development such as long face syndrome
  • Poor memory or ability to focus
  • Restless sleep
  • Sleep deprivation

Did you know that open-mouth breathing can lead to an increased risk of developing gingivitis and tooth decay? Chronic mouth breathing reduces the amount of saliva within the mouth, which is important to neutralizing dangerous acids and washing away harmful bacteria. Without it, the risk of tooth decay and gum inflammation significantly increases.


As stated above, the most important thing you can do as a parent or guardian is to note the signs and symptoms and bring them to your pediatric dentist’s attention. By paying close attention and seeking treatment early, we can often treat the issue before these symptoms progress.

Treatment will vary depending on the underlying cause of your child’s mouth breathing. We will make sure to work with your child’s healthcare team to determine the best treatment for your child. In cases of allergies or nasal obstructions, your child’s primary care doctor may be the best at determining the right treatment. However, dental treatment can include palatal expanders and other dental appliances to help keep your child’s airway clear and encourage him or her to breathe through the nose. Regular dental cleanings and maintaining proper oral hygiene can help to reduce plaque buildup and prevent gingivitis from developing as a result of open-mouth breathing.

For more information or to schedule an appointment, please contact Children’s Dentistry of San Diego office.

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