What is the definition of bronchitis?

Bronchitis refers to the inflammation of the mucous membrane lining the bronchial tubes, which are the passages that carry air to and from the lungs. This condition can result in symptoms such as coughing, wheezing, shortness of breath, and production of mucus. The inflammation can be caused by various factors, including viral infections, bacteria, irritants such as smoke or pollution, and allergens. Recognizing bronchitis as the inflammation specifically in the bronchial tubes is crucial for accurate diagnosis and appropriate treatment. Understanding this definition helps in differentiating bronchitis from other respiratory conditions, such as pharyngitis, which involves the pharynx, or pneumonia, which is an infection that occurs within the lungs.