Chronic bronchitis is a progressive respiratory condition characterized by inflammation and narrowing of the bronchial tubes, leading to persistent cough, excessive mucus production, and airflow obstruction. It is a form of chronic obstructive pulmonary disease (COPD) and is primarily caused by long-term exposure to irritants such as cigarette smoke, environmental pollutants, and occupational hazards. This paper presents an overview of chronic bronchitis, including its etiology, pathogenesis, clinical manifestations, diagnosis, and management strategies. Understanding the complexities of this condition is crucial for effective management and improved quality of life for individuals affected by chronic bronchitis.