What If Your Sleep Test Looks “Normal,” but You Still Feel Exhausted?
What Is Upper Airway Resistance Syndrome?
Why Does the Airway Become Resistant?
A lower jaw that sits farther back can influence the tongue position and the space behind it.
For some patients, this makes the airway more vulnerable to narrowing during sleep.
The significance of jaw position varies from person to person, which is why it should be considered alongside the rest of the patient’s anatomy and sleep findings.
The maxilla, or upper jaw, forms the upper dental arch and contributes to the floor of the nasal cavity.
When it is significantly narrow, the patient may also have:
- A narrow palate
- Crossbite
- Dental crowding
- Limited room for the tongue
- A narrow smile
- Orthodontic relapse
- Reduced transverse oral space
This does not mean every patient with UARS needs expansion.
It means maxillary width should be evaluated when the anatomy suggests it may be relevant.
Breathing through the nose requires an open nasal passage.
Allergies, swollen turbinates, a deviated septum, nasal valve problems, or other forms of nasal obstruction can increase resistance upstream.
When the nose seems to be a major factor, an ENT or other medical provider may need to be involved.
The tongue needs enough room to rest within the dental arches.
A patient with a narrow palate or limited oral volume may compensate with a lower or more posterior tongue posture.
Mouth breathing can also influence resting posture.
When structural treatment creates additional space, myofunctional therapy may help teach the tongue and surrounding muscles to use that space appropriately.
What Does UARS Feel Like?

Why Can UARS Be So Easy to Miss?
Why Does the Airway Become Resistant?
What Do the Teeth and Bite Have to Do With UARS?
How Is UARS Evaluated at Pinewood?
What Treatments May Be Considered for UARS?
| Treatment | What It Addresses | When It May Be Relevant |
|---|---|---|
| Orthodontic Treatment | Addresses dental and skeletal relationships, arch form, crowding, available tongue space, and other structural concerns | Selected patients whose orthodontic or craniofacial anatomy appears to contribute to limited airway space or function |
| Expansion or MARPE | Addresses a true transverse deficiency of the upper jaw by increasing maxillary width | Selected growing patients, older teens, or adults with confirmed skeletal narrowing |
| Nasal/ENT Treatment | Addresses nasal obstruction, septal problems, turbinates, allergies, or other nasal contributors | When nasal resistance appears clinically important |
| Myofunctional Therapy | Works on tongue posture, lip seal, nasal breathing habits, and oral muscle function | As an adjunct when oral posture or muscle patterns are relevant |
| Custom Oral Appliance | Supports the lower jaw forward to reduce upper-airway resistance | Selected adults whose anatomy, dental health, diagnosis, and medical evaluation make mandibular advancement appropriate |
| Positive Airway Pressure (CPAP/PAP) | Uses positive pressure to reduce airway narrowing and flow limitation during sleep | Patients whose sleep physician determines PAP therapy is appropriate |
| Positional or Lifestyle Strategies | Addresses sleep position and modifiable factors that can worsen airway resistance | Selected patients as part of a broader treatment plan |
| Surgical Treatment | Addresses significant nasal, soft-tissue, or skeletal obstruction | Selected patients when anatomy requires a surgical solution |
When Jaw Development and Upper-Jaw Width Are Part of the Picture
Why Treating Flow-Limited Sleep Can Matter
What Makes Pinewood’s Approach to UARS Different?
Start by Finding Out Why Sleep Still Does Not Feel Restorative
Have Questions About Upper Airway Resistance Syndrome? Start Here.
Not exactly, although modern sleep medicine increasingly considers RERA-predominant breathing within the broader obstructive sleep-breathing spectrum. UARS has traditionally been used when patients have increased airflow resistance, repeated respiratory effort-related arousals, and daytime symptoms without enough apneas or hypopneas to meet classic OSA criteria. The terminology can vary, so understanding the actual sleep-study findings is more useful than focusing only on the label.
Possibly. Home sleep apnea tests are designed primarily to identify obstructive sleep apnea and often do not record EEG brain activity. Because RERAs are defined partly by sleep arousals, home testing may not capture all the information needed to evaluate flow-limited breathing. If symptoms remain significant despite a reassuring home study, a sleep physician may recommend more detailed testing.
Yes. Sleep-disordered breathing does not occur only in older patients or people with excess body weight. Some patients with UARS are younger, lean, athletic, female, or highly functional during the day and therefore may not immediately be considered at risk for an airway-related sleep problem. Persistent restless sleep, waking tired, unexplained fatigue, or continually relying on caffeine can still be reasons to investigate sleep quality more closely.
No. Snoring can occur, but it is not required. Some patients primarily experience unrefreshing sleep, fatigue, headaches, fragmented sleep, brain fog, or insomnia-like symptoms. Others may have mouth breathing or subtle labored breathing that is more noticeable to a bed partner than to the patient.
It may be one structural contributor in selected patients. A narrow maxilla can reduce transverse oral space and may be associated with a narrow palate, crossbite, crowding, and limited tongue room. Pinewood may evaluate orthodontic treatment, expansion, or MARPE when a true skeletal deficiency is present, but these treatments should not be presented as universal solutions for UARS.
Oxygen desaturation is only one way sleep-disordered breathing can affect the body. With flow-limited breathing, repeated increases in respiratory effort can trigger brief arousals that fragment sleep even when oxygen levels remain relatively stable. You may therefore get enough hours of sleep but still fail to get continuous, restorative sleep.

