My Child Is Always Mouth Breathing – Could It Be Their Jaws?

You look over at your child watching TV or sleeping, and their mouth is open. Again. Maybe they snore. Maybe they always seem a little congested. Maybe their lips just never seem to stay closed at rest.

As a parent, it’s natural to wonder:

• “Is this just allergies?”
• “Will they grow out of it?”
• “Could their jaws or teeth have something to do with it?”

At Othman Orthodontics in Lombard and Orland Park, IL, we see many children whose parents first bring them in because of mouth breathing, crowded teeth, or a narrow upper jaw. Sometimes these things are connected—and sometimes they’re not. The key is a careful evaluation.

This article is written especially for parents. We’ll walk through:

• What mouth breathing can mean in children
• How jaw growth and narrow arches might play a role
• When an orthodontic evaluation is helpful
• How we work alongside pediatricians and ENT specialists

For a more detailed clinical overview, you can also read: Orthodontics & Airway Health: Understanding the Connection.

What Is Mouth Breathing – and Why Does It Matter?

Almost every child breathes through their mouth occasionally—during a cold, after running hard, or when they’re really stuffed up. We become more concerned when mouth breathing is:

• Present most of the day, even at rest
• Persistent during sleep (often with snoring)
• Paired with other signs like restless sleep or daytime fatigue

Nose breathing helps:

• Filter, warm and humidify the air
• Support healthy growth of the face and jaws
• Encourage a good resting posture for the tongue and lips

Chronic mouth breathing, especially during key growth years, can sometimes be associated with:

• Narrow upper jaws and crowded teeth
• High, “vaulted” palates
• Changes in facial growth pattern (longer, narrower faces)

That’s where orthodontics and jaw development come into the picture.

How Jaw Growth and Narrow Arches Can Be Involved

The upper jaw (maxilla) and palate form the “floor” of the nose and the “roof” of the mouth. When the upper jaw is narrow, we often see:

• Crowded upper teeth
• Crossbite (upper teeth biting inside the lower teeth)
• A high, narrow palate that “pushes up” into the nasal space

In growing children, this pattern may sometimes be linked with mouth breathing or nasal congestion. It doesn’t mean the jaw is the only cause—but jaw and dental development can be part of a bigger puzzle.

The lower jaw (mandible) and tongue also play a role:

• If the lower jaw is set back, there may be less room for the tongue.
• If the tongue rests low in the mouth (instead of against the palate), it may encourage more mouth breathing.

These are the kinds of things we look at carefully during an airway-conscious orthodontic evaluation.

Common Things Parents Notice at Home

Parents often describe the same types of concerns:

• “My child’s lips are almost always parted.”
• “They snore most nights, even when they’re not sick.”
• “They sleep in odd positions with their head tilted way back.”
• “Their teeth seem really crowded already and they’re only 8 or 9.”

You might also notice:

• Dark circles under the eyes (“allergy shiners”)
• Forward head posture
• Difficulty focusing in school or daytime sleepiness

None of these signs automatically mean there’s a serious airway problem—but they’re good reasons to take a closer look, both medically and dentally.

What Happens at an Airway-Conscious Orthodontic Visit?

At Othman Orthodontics, an airway-conscious evaluation looks a little different from a quick “Are the teeth straight?” check.

We Start by Listening

We’ll ask about:

• Sleep habits (snoring, restlessness, bedwetting, waking tired)
• Breathing habits (mouth vs nose, chronic congestion)
• Any history of allergies, enlarged tonsils/adenoids, or ENT visits

Then We Examine the Teeth, Jaws and Face

We look for:

• Crowding, spacing and crossbites
• Narrow arches and high palates
• How the upper and lower jaws relate (overbite, underbite, open bite)
• Resting lip posture and how easily your child can keep lips closed

We may also recommend X-rays or digital scans—always with safety and necessity in mind—to fully understand the jaw relationships.

For more technical details on how we look at airway and jaw structure, see Orthodontics & Airway Health: Understanding the Connection.

How Orthodontic Treatment Can Help in Selected Cases

If we see dental and jaw patterns that may be contributing to your child’s mouth breathing, we might recommend:

Palatal Expansion

A palatal expander gently widens the upper jaw in a growing child. This can:

• Correct crossbites
• Create more room for permanent teeth
• Help shape a broader, more favorable arch form

In some children, widening the upper jaw can also have a positive effect on nasal airflow, especially when combined with appropriate medical care.

Early (Phase I) Orthodontic Treatment

With interceptive orthodontic treatment, we may:

• Improve jaw relationships during growth
• Reduce severe crowding early
• Support more balanced facial and dental development

This doesn’t replace medical treatment, but it can support the structural side of the equation.

Full Orthodontic Treatment Later On

As your child grows into their teens, comprehensive treatment with braces or Invisalign Teen may further refine the bite and alignment, helping create a smile that looks great and functions well.

Working Together with Pediatricians and ENT Specialists

Mouth breathing is rarely “just a teeth problem.” It can involve:

• Allergies or chronic nasal congestion
• Enlarged tonsils or adenoids
• Asthma or other airway conditions

That’s why we often recommend a team approach:

• Pediatrician: for initial evaluation, allergy or asthma management
• ENT specialist: to evaluate tonsils, adenoids and nasal passages
• Sleep specialist: if there are signs of sleep-disordered breathing or suspected sleep apnea

Our role is to:

• Evaluate your child’s jaw and dental development
• Identify patterns that may be related to airway challenges
• Provide orthodontic treatment that supports healthier arch and jaw development where appropriate

When Should My Child Be Seen by an Orthodontist?

The American Association of Orthodontists recommends that children have their first orthodontic evaluation by age 7. We often see kids earlier if parents notice:

• Consistent mouth breathing or snoring
• Very crowded front teeth, even in early mixed dentition
• Crossbites or jaw shifts when biting
• Concerns from a pediatrician, dentist or ENT about facial growth or bite

An evaluation does not always mean treatment is needed right away. Sometimes, the best plan is to:

• Monitor growth
• Coordinate with medical providers
• Start treatment at a later, more ideal time

Airway-Conscious Orthodontic Care in Lombard & Orland Park, IL

Lombard Office

Our Lombard office offers airway-aware orthodontic evaluations, expanders, interceptive treatment and comprehensive braces/Invisalign for families in Lombard, Downers Grove, Elmhurst, Wheaton, Villa Park, Oak Brook, Oakbrook Terrace, Hinsdale, Westmont, Lisle, Naperville.

Orland Park Office

Our Orland Park office provides the same services for families in Orland Park, Tinley Park, Palos Heights, Palos Park, Homer Glen, Oak Forest, Mokena, Frankfort, New Lenox, Lockport.

Worried About Your Child’s Mouth Breathing?

If your child is constantly mouth breathing, snores regularly or has a very narrow, crowded smile, it’s reasonable to ask whether their jaws and teeth are part of the story.

Schedule an airway-conscious orthodontic consultation in Lombard, IL or an airway-conscious orthodontic consultation in Orland Park, IL with Othman Orthodontics.

We’ll listen to your concerns, carefully evaluate your child’s bite, jaws and facial growth, and—when appropriate—work together with your pediatrician or ENT. Our goal is to support not only a healthier, straighter smile, but also healthier habits for breathing, sleeping and growing.