The bronchi are the airways leading from the trachea to the lungs. They are critical for breathing, but also play a role in immune function.

Bronchitis, bronchiectasis, and bronchiolitis are all bronchial disorders, but the underlying causes and treatments for these diseases vary.

Acute bronchitis and chronic bronchitis are different conditions with very similar symptoms. Find out how to tell the difference and how to get help.

Bronchitis is airway inflammation. Acute bronchitis is caused by infection or irritation, chronic bronchitis by repeated exposure to inhaled toxins.

Bronchiolitis and bronchitis are both infections in the lungs, but there are important differences in symptoms, management, and who is most at risk.

A wet cough that lingers is a sign your kid may have bronchitis. Viral bronchitis needs rest and time, but bacterial bronchitis is treated with antibiotics.

The most common symptoms of bronchitis are a productive cough and wheezing. Learn the warning signs when medical attention is warranted.

A diagnosis of acute or chronic bronchitis is based on medical history, imaging tests, and in some cases, pulmonary function tests and blood tests.

The bronchioles are the internal airways of the lungs. Learn how they function and why they are vulnerable to conditions like asthma and emphysema.