An estimated 30 million American adults have obstructive sleep apnea, but roughly 80 percent of cases remain undiagnosed. That figure comes from the American Academy of Sleep Medicine (AASM), which tracks how the country identifies and treats the disorder.
Left untreated, the condition is linked to serious downstream problems. The AASM says obstructive sleep apnea can contribute to cardiovascular disease, stroke, diabetes, and depression, and calculates that undiagnosed cases cost the US around $149.6 billion a year in health care use, accidents, and lost productivity.
Part of the reason so many cases slip past a doctor is that loud snoring is only one of the signals. The National Heart, Lung, and Blood Institute (NHLBI) and the AASM list a broader set of clues that people often dismiss as unrelated ailments.
The 8 warning signs worth taking seriously
1. Loud, chronic snoring. The NHLBI describes frequent loud snoring as one of the most common signs, particularly in men. It becomes more suspicious when it is broken up by silence, gasps, or choking.
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2. Breathing pauses a partner notices. The NHLBI lists breathing that starts and stops during sleep as a hallmark symptom. Because it happens while you are asleep, a bed partner is usually the person who spots it.
3. Excessive daytime sleepiness. Feeling drowsy through the day, nodding off in meetings, or fighting to stay awake behind the wheel is a red flag. The NHLBI notes it can interfere with learning, focusing, and reacting.
4. Morning headaches. Headaches on waking are on the NHLBI symptom list and are more common in women. They are thought to reflect the drops in blood oxygen that occur during repeated breathing pauses.
5. Waking with a dry mouth. Dry mouth on waking is another symptom the NHLBI flags. It often points to mouth breathing during the night, a pattern common in people whose airway is repeatedly blocked.
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6. Mood changes and irritability. The AASM lists irritability among warning signs, and fragmented sleep is well known to affect mood. What can look like stress or a rough patch may in fact be a symptom of an untreated sleep disorder.
7. Difficulty concentrating or memory lapses. Poor concentration and memory problems appear on the AASM warning-sign list. Repeated overnight arousals prevent the deep, restorative stages of sleep the brain relies on.
8. Frequent nighttime urination. Getting up several times a night to use the bathroom, called nocturia, is another sign both the NHLBI and AASM name. It is often blamed on aging or fluid intake, but it can reflect sleep apnea instead.
Why the missed diagnoses matter
The health stakes are what make the undiagnosed rate so consequential. The NHLBI states that its research has found sleep apnea may raise the risk for high blood pressure, diabetes, heart disease, and stroke. Those are among the leading drivers of illness and death in the country.
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Treatment can shift several of those risks. In the AASM report, Dr. Indira Gurubhagavatula, chair of the Tool Development and Surveillance Workgroup, said the benefits of treatment "include improved daytime alertness, cardiovascular health, performance at home and at work, and quality of life."
Diagnosis usually requires a sleep study, either at home or in a lab. The NHLBI advises anyone recognizing these symptoms to raise them with a healthcare provider, who can decide whether testing is warranted. That conversation is the step most undiagnosed patients never take, often because they do not connect a morning headache or a dry mouth with what happens while they are asleep.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.