Lungs & breathing

Breathing is easy to take for granted until something makes it hard. This section covers conditions that affect the lungs and airways, such as asthma, along with the symptoms that bring people to a doctor: a cough that lingers, wheezing, shortness of breath, or tightness in the chest. You will find what triggers these problems, how they are diagnosed, and the treatments and daily habits that keep airways open. Some breathing trouble is mild and manageable at home, and some is an emergency. Learn to tell the difference. Call 911 if breathing becomes severe or if the lips or fingertips turn blue.