Orofacial myofunctional disorders, often called OMDs, are patterns of muscle function involving the mouth, face, tongue, lips, jaw, and airway that may interfere with normal breathing, swallowing, chewing, speech, dental development, and facial growth. These conditions can affect both children and adults, and they are often overlooked because the signs may appear gradually or seem unrelated at first.
In children, OMDs may appear during growth and development, especially when habits such as mouth breathing, thumb sucking, prolonged pacifier use, or tongue thrusting affect oral posture.
In adults, OMDs may continue from childhood or develop alongside issues such as chronic mouth breathing, jaw tension, sleep-disordered breathing, orthodontic relapse, or improper tongue resting posture.
What Are Orofacial Myofunctional Disorders?
A healthy oral resting posture usually includes gently closed lips, the tongue resting lightly against the roof of the mouth, breathing primarily through the nose, teeth slightly apart at rest, and balanced facial and jaw muscle activity. When these patterns are disrupted, the muscles of the face and mouth may begin working inefficiently. Over time, this can contribute to functional concerns and, in some cases, dental or orthodontic changes.
Common Signs in Children
Children with an orofacial myofunctional disorder may show signs such as frequent mouth breathing, open-mouth posture while resting, a tongue that rests low or forward in the mouth, tongue pushing against or between the teeth when swallowing, difficulty chewing certain foods, messy or slow eating, speech sound concerns, drooling beyond the expected developmental age, snoring, restless sleep, prolonged thumb sucking, finger sucking, pacifier habits, crowded teeth, or changes in bite development.
Because children are still growing, early identification can be especially helpful. Addressing unhealthy oral habits and improving muscle function may support better breathing, swallowing, and oral development. A therapist can also help families understand which habits may be contributing to the pattern and when referral to another provider may be needed.
Common Signs in Adults
Adults may experience symptoms such as chronic mouth breathing, dry mouth in the morning, jaw tension, facial muscle fatigue, tongue thrust when swallowing, orthodontic relapse after braces or aligners, difficulty keeping lips closed at rest, clenching or compensatory oral habits, snoring, sleep-related breathing concerns, neck tension, jaw tension, or swallowing patterns that feel effortful.
Many adults discover OMDs after orthodontic treatment, dental evaluations, airway assessments, or because they notice long-standing tension and poor oral posture. Although adults are no longer growing, the muscles of the mouth and face can still learn new patterns with repetition, awareness, and proper guidance.
What Causes Orofacial Myofunctional Disorders?
There is rarely one single cause. OMDs often develop from a combination of structural, functional, developmental, and habitual factors. Common contributors include chronic nasal congestion or allergies, enlarged tonsils or adenoids, mouth breathing, tongue-tie or restricted oral tissues, prolonged thumb or pacifier habits, poor oral resting posture, dental crowding, bite differences, low muscle tone, sleep-disordered breathing, neurological or developmental conditions, and learned habits from childhood.
A therapist specializing in orofacial myofunctional therapy does not simply look at the mouth in isolation. They evaluate how the tongue, lips, cheeks, jaw, breathing, posture, and swallowing patterns work together. This broader view helps identify why the pattern is happening and what needs to change for long-term improvement.
Why Tongue Posture and Nasal Breathing Matter
The tongue is one of the most important muscles involved in oral function. At rest, the tongue should usually sit against the palate, or roof of the mouth. This position helps support proper oral function and may influence dental stability. When the tongue rests low in the mouth or pushes forward against the teeth, it may contribute to open-mouth posture, tongue thrust swallowing, speech differences, or orthodontic relapse.
Nasal breathing is also important. Breathing through the nose helps filter, warm, and humidify air. When a child or adult regularly breathes through the mouth, the lips may remain open, the tongue may sit low, and the jaw may adapt to an open resting posture. Over time, these patterns can become habitual, even after the original cause of mouth breathing improves.
How Are Orofacial Myofunctional Disorders Treated?
Orofacial myofunctional disorders are typically treated through orofacial myofunctional therapy. This specialized therapy approach uses targeted exercises, awareness training, and behavior changes to improve the function and coordination of the oral and facial muscles. The goal is not simply to strengthen muscles. The goal is to retrain patterns so the tongue, lips, jaw, and breathing system work together more efficiently.
A therapist trained in this field may be a speech-language pathologist, dental hygienist, physical therapist, occupational therapist, or another qualified professional with additional training in orofacial myology. The exact provider may vary depending on location, professional licensing, and the client’s needs.
What Happens During Myofunctional Therapy?
Therapy usually begins with a detailed evaluation. The therapist may assess tongue resting posture, lip closure, nasal versus mouth breathing, swallowing pattern, chewing and oral coordination, jaw movement, facial muscle tension, oral habits, speech patterns, dental or orthodontic history, sleep concerns, and airway-related symptoms. After the evaluation, the therapist creates an individualized treatment plan. Exercises may focus on establishing a proper tongue-resting posture, encouraging comfortable lip closure, supporting nasal breathing habits, correcting tongue-thrust swallowing, reducing harmful oral habits, and improving chewing and oral coordination.
Therapy for Adults
Adults can also benefit from therapy, especially when they are motivated to practice consistently. Treatment may help adults improve oral resting posture, reduce tongue-thrusting patterns, support orthodontic stability, enhance awareness of breathing and muscle habits, and improve sleep quality. Some adults seek therapy before, during, or after orthodontic treatment, while undergoing treatment with their ENT for breathing concerns, or in conjunction with sleep apnea therapies. Others begin because of jaw tension, mouth breathing, sleep-related breathing concerns, or long-standing dysfunctional swallowing patterns.
Therapy for Children
For children, therapy is often most effective when parents or caregivers are involved. Children need encouragement and consistency at home because the goal is to build new habits over time. A therapist may use age-appropriate exercises, games, visual cues, and short daily practice routines. Treatment may also involve collaboration with pediatric dentists, orthodontists, ENT physicians, allergists, or speech-language pathologists.
A Team-Based Approach Is Often Best
Orofacial myofunctional therapy is often part of a broader care plan. Depending on the client’s needs, a therapist may collaborate with dentists, orthodontists, pediatric dentists, ENT physicians, allergists, sleep medicine providers, speech-language pathologists, physical therapists, and other healthcare professionals. This team-based approach helps identify the root causes of the disorder rather than only treating the visible symptoms.
When Should You Seek an Evaluation?
Consider an evaluation if you or your child regularly experiences mouth breathing, tongue thrusting, open-mouth posture, orthodontic relapse, difficulty swallowing, speech concerns, persistent oral habits, or sleep-related breathing concerns. An orofacial myofunctional therapist can assess whether muscle patterns may be contributing to the issue and recommend appropriate next steps.
Final Thoughts
Orofacial myofunctional disorders can affect how adults and children breathe, swallow, speak, chew, and relax their facial muscles. While these patterns may seem small, they can influence comfort, oral development, dental stability, and overall function. With proper evaluation and a personalized therapy plan, many people can improve tongue posture, nasal breathing habits, swallowing patterns, and oral muscle coordination.
This article is for educational purposes only and does not replace evaluation or treatment from a qualified healthcare provider. For concerns involving breathing, sleep, swallowing, dental development, or airway obstruction, consult the appropriate medical or dental professional.