What is a characteristic feature of chronic bronchitis?

Excess mucus production is a hallmark characteristic of chronic bronchitis. This condition is primarily defined by long-term inflammation of the bronchial tubes, which leads to increased mucus secretion from the goblet cells lining the airways. The production of excess mucus is a response to irritants, such as smoking or pollution, and contributes significantly to the obstruction of airflow, resulting in symptoms like chronic cough and difficulty breathing.

This increased mucus can clog the airways, making it difficult for individuals to clear it, which further exacerbates respiratory issues. Chronic bronchitis is often part of a spectrum of disease known as Chronic Obstructive Pulmonary Disease (COPD), and the presence of excess mucus is a key factor in its diagnosis.

By understanding this feature, one can better appreciate how chronic bronchitis differs from other respiratory conditions, such as emphysema, which is characterized by loss of elastic fibers in the alveolar walls rather than increased mucus production.