Bronchitis happens when your bronchial tubes become swollen and inflamed. Your bronchial tubes are responsible for delivering air from your windpipe to your lungs. Bronchitis makes it harder for air ...

Acute bronchitis usually clears up on its own, but you may have a cough that lasts up to four weeks. Contagious viruses typically cause acute bronchitis, which spreads through contact or airborne ...