Chronic bronchitis is a respiratory disease characterized by inflammation of the bronchi and excessive mucus production. It is a recurrent and persistent condition that can lead to a cough that lasts for months or even years. Other synonyms for chronic bronchitis include chronic obstructive pulmonary disease (COPD), chronic bronchiolitis, and chronic respiratory disease. In severe cases, chronic bronchitis can cause breathing difficulties, chest pain, and other respiratory problems. Smoking and exposure to air pollution are the leading causes of chronic bronchitis. Managing the symptoms and avoiding the triggers can help to control chronic bronchitis and improve the quality of life of those affected by the disease.