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Dear Savvy Senior,

I have struggled with shortness of breath for several years now. I just thought I was getting old and fat, but a friend recently told me about COPD. Could I have COPD and not know it?

—Huffing and Puffing

Dear Huffing,

Yes. COPD, or chronic obstructive pulmonary disease, is a progressive lung disease that affects an estimated 30 million Americans. But about half of them don’t know they have it.

COPD — a term used to describe a variety of lung diseases, including emphysema and chronic bronchitis — develops slowly, so symptoms may not be obvious until damage has occurred.

Symptoms can include an ongoing cough or a cough that produces a lot of mucus, lack of energy and/or shortness of breath especially during physical activity, wheezing and chest tightness, blue lips or fingernails, or swelling in your feet, ankles or legs.

Those most at risk are smokers or former smokers over age 40, and people who have had long-term exposure to other lung irritants like secondhand smoke, air pollution, chemical fumes and dust.

If you’re experiencing any of the aforementioned symptoms, you need to get tested by your doctor. A simple breathing test called spirometry can tell if you have COPD, and if so, how severe it is. Early screening can also identify COPD before major loss of lung function occurs.

While there’s no cure, there are things you can do to limit further damage, including:

Quit smoking

If you smoke, the best thing you can do to prevent more damage to your lungs is to quit. To get help, the National Cancer Institute offers a number of smoking cessation resources at SmokeFree.gov or call 1-800-QUIT-NOW.

Or ask your doctor about prescription antismoking drugs that can help reduce your nicotine craving.

Avoid air pollutants

Stay away from things that could irritate your lungs, such as dust, allergens and strong fumes.

Also, to help improve your air quality at home, remove dust-collecting clutter and keep carpets clean; run the exhaust fan when using cleaning products, bug sprays or paint; ban smoking indoors; and keep windows closed when outdoor air pollution is high (see AirNow.gov for daily reports).

Get vaccinated

The coronavirus and flu can cause serious problems for people who have COPD, so if you haven’t already done so, get vaccinated for COVID-19 and get a flu shot every fall to help avoid getting sick.

Also ask your doctor about getting the pneumococcal immunizations for protection against pneumonia.

Take prescribed medications

Bronchodilators (taken with an inhaler) are commonly used for COPD. They help relax the airway muscles to make breathing easier.

Depending on how severe your condition is, you may need a short-acting version only for when symptoms occur, or a long-acting prescription for daily use. Inhaled steroids may also help reduce inflammation and mucus and prevent flare-ups.

For more information, visit the COPD Foundation at COPDfoundation.org or call the COPD information line at 1-866-316-2673.