What is the primary characteristic of chronic bronchitis?

Chronic bronchitis is primarily characterized by excessive mucus production. This condition involves inflammation of the bronchial tubes, leading to an increase in mucus secretion. Patients often experience chronic cough that produces sputum, particularly in the morning. Over time, the persistent inflammation and mucus production can obstruct airflow and lead to difficulties in breathing.

This characteristic is a key differentiator for chronic bronchitis within the spectrum of chronic obstructive pulmonary disease (COPD). While other factors, such as persistent cough or susceptibility to acute respiratory infections, may also be present in patients with chronic bronchitis, the hallmark of the disease is indeed the excessive mucus production. This symptom is often a result of prolonged exposure to irritants, such as cigarette smoke or environmental pollutants, which further exacerbates the condition and leads to the chronic nature of the disease.