According to the American Lung Association, more than 11 million people suffer from COPD, or chronic obstructive pulmonary disease. But that’s not the most troubling thing. Believe it or not, it is believed that twice – or even three times – this many Americans have COPD and don’t even know it. Read on to see if any of the condition’s symptoms seem familiar.

Chronic cough

Unlike the kind of cough you get from a cold or infection, COPD is famous for causing its victims painful coughing. It doesn’t go away with time, antibiotics or any of the usual remedies. And unlike chronic bronchitis, COPD coughing doesn’t come and go. It just comes … and stays (and/or gets worse).

Mucus

Another symptom of the early stages of COPD is an increased production of mucus, or phlegm, in the throat. This is your lungs’ attempt to safeguard themselves from irritants in the environment or ones that enter the body, such as tobacco smoke.

Shortness of breath

Feeling out of breath, or breathing heavier with mild exertion, is another classic sign of COPD. If you notice this (or any of the symptoms above) see your physician as soon as possible.