If your child's speech-language pathologist or dentist has mentioned an orofacial myofunctional disorder, you might be hearing this term for the first time. It's a mouthful to say, and it's not always well explained. This guide breaks down what OMD actually means, what causes it, and the signs to watch for in your child.

What Is an Orofacial Myofunctional Disorder?

An orofacial myofunctional disorder, often shortened to OMD, refers to a pattern of abnormal muscle function in and around the mouth and face. This includes the tongue, lips, jaw, and the muscles involved in breathing, chewing, swallowing, and speaking.

In a typical pattern, the tongue rests gently against the roof of the mouth, the lips stay closed at rest, and breathing happens through the nose. With an orofacial myofunctional disorder, one or more of these patterns is disrupted. The tongue might rest low or push forward against the teeth, the lips might stay open at rest, or breathing might happen primarily through the mouth.

These patterns might seem small, but because the muscles of the mouth and face are involved in so many daily functions, an OMD can affect much more than just how a child talks.

What Causes an Orofacial Myofunctional Disorder?

OMD causes vary from child to child, and often more than one factor is involved. Common contributors include:

Tongue tie or lip tie. When the tissue connecting the tongue or lip is too tight or restrictive, it can limit normal movement and lead to compensatory muscle patterns.

Prolonged thumb sucking or pacifier use. Extended use beyond the toddler years can shape how the tongue and jaw develop and rest.

Chronic mouth breathing. This can develop from allergies, enlarged tonsils or adenoids, or a chronically stuffy nose, and it often becomes a habit that persists even after the original cause is treated.

Low muscle tone. Some children have naturally lower muscle tone in the face and mouth, making it harder to maintain typical resting postures.

Structural factors. A narrow palate, dental misalignment, or airway obstructions can all contribute to the development of an OMD.

It's also worth noting that these factors often influence one another. For example, chronic mouth breathing can contribute to changes in palate shape over time, which can then make nasal breathing even more difficult, creating a cycle that's hard to break without intervention.

Common OMD Symptoms to Watch For

OMD symptoms can show up differently depending on a child's age and the specific muscle patterns involved. Some of the most common signs include:

In infants:

Difficulty latching or sustaining a latch during feeding
Clicking sounds while nursing or bottle feeding
Excessive drooling beyond the typical teething stage

In toddlers and young children:

Mouth breathing, especially noticeable during sleep
Tongue resting between or against the front teeth
Difficulty transitioning to textured foods
Persistent thumb sucking or pacifier dependence past age three

In school-age children:

Speech sound errors, particularly with sounds like s, z, and th
Open-mouth resting posture
Snoring or restless sleep
Dental issues like an open bite or teeth that don't align properly despite orthodontic treatment

If you're noticing a combination of these signs, it doesn't automatically mean your child has an orofacial myofunctional disorder, but it's a good reason to bring it up with a provider who specializes in this area.

Why Does an Orofacial Myofunctional Disorder Matter?

Because the muscles involved in an OMD play a role in so many everyday functions, an untreated disorder can influence more than just speech. It can affect:

Feeding and swallowing, making certain textures or eating patterns more difficult
Dental and orthodontic outcomes, sometimes undoing the results of braces or other treatment
Sleep quality, particularly when mouth breathing disrupts restful sleep
Speech clarity, especially with sounds that rely on precise tongue placement

This is why many myofunctional therapists work closely with dentists, orthodontists, ENTs, and speech-language pathologists. Addressing the root muscle pattern, rather than just the symptom, often leads to more lasting results.

How Is an Orofacial Myofunctional Disorder Treated?

Treatment typically involves orofacial myofunctional therapy, a structured program of exercises designed to retrain the muscles of the mouth and face toward typical function. This might include exercises to build tongue strength, improve lip closure, or support a shift toward consistent nasal breathing.

Depending on the underlying cause, treatment may also involve coordination with other providers, such as an ENT to address airway concerns or a dentist to evaluate a tongue tie release.

Frequently Asked Questions

What are the main symptoms of an orofacial myofunctional disorder? Common OMD symptoms include mouth breathing, a tongue that rests low or forward, speech sound errors, prolonged thumb sucking, and dental issues like an open bite.

Can an orofacial myofunctional disorder go away on its own? It's uncommon for an OMD to resolve without intervention, since the underlying muscle pattern usually needs to be actively retrained through targeted therapy.

Is OMD the same as a tongue tie? Not exactly. A tongue tie can be one cause of an orofacial myofunctional disorder, but OMD refers more broadly to the pattern of muscle dysfunction itself, which can have several different causes.

At what age can OMD be treated? Myofunctional therapy can be adapted for a wide age range, from feeding-focused intervention in infancy to structured exercise programs for older children and even adults.

Think your child might be showing signs of an orofacial myofunctional disorder? Schedule a discovery call to get a clear picture of what's going on and what can help.

What Is an Orofacial Myofunctional Disorder? (OMD Explained for Parents)