Upper airway resistance syndrome (UARS) is a sleep-related breathing disorder in which a narrowed airway makes you work harder to breathe, disturbing sleep without the full pauses of sleep apnea. It often causes exhaustion that standard tests can miss. At Kinard Family Dental in Helotes, TX, Dr. Sarah Kinard evaluates UARS as part of adult airway sleep dentistry and treats it with oral appliance therapy.
How Is UARS Different From Sleep Apnea?
In obstructive sleep apnea, the airway closes partly or completely, and breathing pauses long enough for oxygen levels to drop. In UARS, the airway narrows but does not close. Air still gets through, but only with extra effort, and the brain responds to that effort by briefly waking out of deep sleep, often many times an hour.
Because breathing never fully stops and oxygen levels often stay normal, UARS can look reassuring on some sleep tests. Many sleep physicians now view it as part of the same spectrum as sleep apnea rather than an entirely separate condition. For the person living with it, though, the fragmented sleep is very real.
What Are the Symptoms of UARS?
- Waking up unrefreshed after a full night in bed
- Daytime fatigue, brain fog or trouble concentrating
- Difficulty falling or staying asleep
- Morning headaches and jaw or neck tension
- Teeth grinding or clenching at night
- Snoring, though some people with UARS barely snore at all
Some people also notice anxiety, irritability or digestive complaints. Because these symptoms are common and vague, UARS is often blamed on stress or poor sleep habits for years.
A helpful clue is the mismatch between time in bed and how you feel. If you regularly sleep seven or eight hours and still wake tired, something is likely interrupting the quality of that sleep, even if you do not remember waking.
What Causes the Airway to Narrow During Sleep?
When you fall asleep, the muscles that hold the throat open relax. In a roomy airway, that makes little difference. In a narrow one, the relaxed tissue and tongue reduce the space enough that every breath takes extra effort. Common contributors include:
- A narrow upper jaw or high palate that leaves the tongue little room
- A lower jaw that sits further back
- Nasal blockage from allergies, a deviated septum or swollen turbinates
- Sleeping on your back, which lets the tongue fall backward
- Alcohol or sedating medications close to bedtime
Any of these can play a part, and many people have more than one. That is why a single solution rarely fits everyone, and why the evaluation looks at the nose, the jaws and sleeping habits together.
Who Gets Upper Airway Resistance Syndrome?
UARS often affects people who do not fit the typical picture of sleep apnea. It is frequently seen in younger adults, women and people at a healthy weight. A common factor is anatomy: a narrow upper jaw, a recessed lower jaw, a high palate or a tongue that has little room, all of which leave a smaller airway at the back of the throat.
Why Is UARS Often Missed?
Many home sleep tests focus on oxygen drops and full breathing pauses. Since UARS can cause neither, a basic test may come back normal even when sleep is badly disrupted. Detecting the brief arousals caused by breathing effort often requires a more detailed in-lab sleep study, ordered by a physician.
If you have been told your sleep test was normal but you still wake exhausted, it is reasonable to ask your physician whether breathing effort and arousals were measured.
How Is UARS Diagnosed?
A physician makes the diagnosis, usually with an in-lab sleep study that records breathing effort and the brief arousals it causes, not just oxygen levels. Results are often reported as a respiratory disturbance index, which counts those effort-related arousals alongside pauses and shallow breaths. Questionnaires about daytime sleepiness and a review of your symptoms add to the picture.
A dental airway evaluation complements the medical diagnosis by showing the structural reasons behind it. Knowing both the diagnosis and the cause makes it much easier to choose a treatment that works.
Why Is UARS Often Mistaken for Insomnia?
Because the arousals caused by UARS are brief, most people do not remember waking. What they notice instead is light, restless sleep and difficulty falling back asleep, which looks a lot like insomnia. Sleep aids and sleep hygiene changes may help a little, but they do not address the narrowed airway that keeps interrupting sleep.
If insomnia treatment has not helped, or you also clench your teeth, wake with headaches or breathe through your mouth, an airway evaluation can show whether breathing effort is part of the problem.
How Does a Dentist Help With UARS?
The dental exam often reveals the clues: worn teeth from grinding, a scalloped tongue, a narrow palate or a recessed jaw. At our Helotes practice, a CBCT airway scan shows the size and shape of your airway in three dimensions, which helps explain why breathing takes extra effort. Our airway dentistry page explains this evaluation.
How Is UARS Treated?
Treatment aims to open the airway so breathing takes less effort. A custom oral appliance that holds the jaw forward during sleep is a common and comfortable option. Treating nasal congestion can also help. For adults with a narrow upper jaw, Vivos treatment is designed to develop the jaw and airway over time. Some patients use CPAP, guided by their physician.
What Can You Do at Home to Sleep Better?
- Sleep on your side rather than your back to keep the tongue forward.
- Treat nasal congestion and allergies so breathing through the nose is easier.
- Avoid alcohol and heavy meals in the few hours before bed.
- Keep a consistent sleep schedule, even on weekends.
These habits can reduce symptoms, but they rarely solve a structural narrowing on their own. If you still wake exhausted, an evaluation is the next step.
Can UARS Affect Your Jaw and Teeth?
Yes. Many people with UARS clench or grind at night as the body tries to hold the airway open. Over time, that can wear teeth, crack fillings and strain the jaw joints. If you have jaw pain alongside poor sleep, our TMJ/TMD treatment page explains how the two are often connected.
What Happens at an Adult Airway Evaluation?
The appointment starts with a conversation about your sleep, energy, headaches, jaw symptoms and any sleep testing you have already had. Dr. Kinard examines your teeth, bite, tongue, palate and throat, then uses a CBCT airway scan to see the airway in three dimensions. You receive a clear explanation of what was found, and when a sleep study is needed, we coordinate it with a physician so treatment is based on a confirmed diagnosis.
Schedule an Adult Airway Evaluation in Helotes
Waking up exhausted is not something you have to accept. Dr. Sarah Kinard is a Diplomate of the American Board of Dental Sleep Medicine and works with local sleep physicians on diagnosis. Kinard Family Dental is at 12740 Bandera Road, Suite 100, Helotes, TX 78023, serving San Antonio, Boerne and Leon Valley. Call (210) 695-1200 or request an appointment.
Schedule NowFrequently Asked Questions
Is UARS the same as sleep apnea?
Not exactly. UARS involves extra breathing effort and frequent arousals without the full breathing pauses of sleep apnea. Many physicians consider it part of the same spectrum of sleep-disordered breathing.
Can a home sleep test detect UARS?
Often not. Many home tests measure oxygen drops and full pauses, which UARS may not cause. An in-lab sleep study ordered by a physician is usually better at detecting it.
Is UARS dangerous?
UARS fragments sleep, which affects energy, mood, concentration and quality of life. Some cases progress toward sleep apnea over time, so it is worth evaluating and treating.
Can thin people have airway problems during sleep?
Yes. UARS is common in people at a healthy weight, because jaw and airway shape matter as much as body weight.
Does an oral appliance help UARS?
For many people, yes. A custom appliance holds the jaw forward to keep the airway open, which reduces the effort of breathing and the arousals it causes.
Can UARS cause anxiety?
Fragmented sleep can contribute to anxiety, irritability and low mood. Many patients notice their mood improves as sleep quality improves.
Can UARS cause teeth grinding?
It can. Many people with UARS clench or grind at night as the body works to keep the airway open. Treating the airway often reduces grinding, and a protective appliance guards the teeth in the meantime.
What should I do if my sleep test was normal but I am still exhausted?
Ask your physician whether breathing effort and arousals were measured, and consider an airway evaluation. A normal basic test does not rule out UARS.
