What is a primary characteristic of chronic bronchitis?

Chronic bronchitis is primarily characterized by excessive mucus production in the bronchial tree. This condition arises due to long-term irritation of the airways, most commonly from smoking or exposure to pollutants. Over time, the bronchial glands become hyperplastic, leading to an increase in mucus secretion. This excessive mucus can obstruct airflow, make breathing difficult, and promote chronic cough, which is a hallmark symptom of chronic bronchitis.

The production of thick mucus in the airways also provides an environment conducive to bacterial infections, further exacerbating the condition. This symptom differentiates chronic bronchitis from other respiratory issues, where decreased mucus production or inflammation may not be as notable or prevalent. Understanding this characteristic helps in acknowledging the impact of chronic bronchitis on airflow limitation and respiratory function in patients.