Chronic bronchitis causes

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Tobacco smoking is the most common cause.^[1] Pneumoconiosis and long-term fume inhalation are other causes.^[1] Allergies can also cause mucus hypersecretion, thus leading to symptoms similar to asthma or bronchitis.^{[citation needed]}