Bronchitis happens when the lining of the bronchial tubes becomes irritated and inflamed. Acute bronchitis often follows an infection and may improve with time and supportive care. Chronic bronchitis, however, is a more serious long-term condition that usually involves ongoing mucus production and repeated airway inflammation.
Because bronchitis symptoms overlap with several pulmonary disorders, an accurate diagnosis matters. Identifying the type of bronchitis and whether another condition is contributing can make treatment more effective.