Chronic obstructive pulmonary disease (COPD) includes two lung conditions—chronic bronchitis and emphysema. More than 12 million people in the United States have COPD, but millions more have COPD without knowing it.

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13 Worst Jobs for Your Lungs

If you work in these 13 fields, your lungs may be at risk.

15 COPD Symptoms

Chronic obstructive pulmonary disease (COPD) is a common problem—24 million people in the U.S. are thought to have it—but few people have a grasp of what it is.

10 Ways to Treat COPD

Treatments and medication for chronic obstructive pulmonary disease (COPD) range from simple breathing exercises to medications and even surgery.

15 COPD Healthy Eating Tips

If you have trouble breathing, daily activities—even eating a meal—can be a challenge. Follow these 15 healthy eating tips for people with COPD.

7 Ways to Gain Weight If You Have COPD

Although weight loss sounds like a good thing, it's not—if you have chronic obstructive pulmonary disease. This lung condition, which includes chronic bronchitis and emphysema, can cause severe weight and muscle loss. About one in four people with COPD are too thin.

More on COPD

10 U.S. Cities With the Cleanest Air

Here are the 10 U.S. cities with the cleanest air, according to the American Lung Association’s annual report, which looks at levels of ozone and particulates (tiny particles that can get lodged in your lungs).

How Is COPD Diagnosed?

If you're being evaluated for COPD, you can expect to receive x-rays, CT scans, and lung function tests.