The American Lung Association says more than 16 million people in the United States have chronic obstructive pulmonary disease, or COPD, a progressive lung condition that narrows the airways and makes breathing steadily harder. Millions more are estimated to have it without a diagnosis.
That undercount matters because the earliest signs are the easiest to explain away. A morning cough, a bit of phlegm, feeling winded on the stairs, most people file these under aging, being out of shape, or a lingering cold.
The Lung Association lists five specific warning signs, each with its own threshold for when a symptom stops being ordinary.
The signs the Lung Association wants adults to watch for
A cough that will not go away. The Lung Association defines a cough lasting eight weeks or longer as chronic and says any cough past that mark should be discussed with a doctor. It is one of the first symptoms COPD tends to produce.
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Mucus production that drags on. The organization notes that phlegm or mucus production lasting a month or longer can point to lung disease. A daily productive cough is not something to wait out.
Shortness of breath that is out of proportion. According to the Lung Association, it is not normal to feel breathless after little or no exertion, or to stay winded long after exercise. Adults often chalk it up to age or weight, but it is one of the most telling early COPD signs.
Chest tightness or unexplained chest pain. The Lung Association flags chest pain that lasts a month or more, particularly when it gets worse with breathing in or coughing.
Repeated lung infections. The organization's COPD page includes recurring acute bronchitis or pneumonia among common early signs. Frequent respiratory infections in an adult are worth flagging, not brushing off.
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Why so many people miss the window
COPD is not rare. Federal data show it is a leading cause of death in the United States, with 141,733 deaths recorded in 2023, according to a CDC data brief published in May 2025. Prevalence rises sharply with age, from under 1 percent of adults in their early twenties to about 1 in 10 adults aged 75 and older.
Yet the symptoms sneak up gradually. Harold Wimmer, National President and CEO of the American Lung Association, has said that early screening and diagnosis mean treatment can begin sooner, which may prevent further damage to the lungs. In the same statement, he added that many people do not recognize COPD symptoms until later stages of the disease.
How COPD is confirmed
There is no cure for COPD, but the Lung Association says treatment, including medications and pulmonary rehabilitation, can reduce symptoms and improve quality of life when the disease is caught earlier. Diagnosis is straightforward. A spirometry test, a simple breathing test that measures how much air the lungs can move and how quickly, is the standard tool clinicians use to confirm COPD.
If any of these signs apply, especially in adults over 40 or with a history of smoking or heavy exposure to dust, fumes or secondhand smoke, the Lung Association's guidance is to raise them with a doctor and ask whether a spirometry test is warranted.
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