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Asthma is best described as a chronic inflammatory condition rather than a respiratory disease. In fact, asthma's origins have more in common with arthritis than they do with emphysema or tuberculosis. Asthma is simply a chronic inflammation of the airway rather than the joints. People with asthma have inflamed, hyperreactive airways that produce excessive bronchial mucus. After repeated asthma attacks, the airway lining becomes scarred, and immune cells, which cause or exacerbate inflammation, proliferate there. [2] Asthma eventually damages the airway permanently, making it more prone to inflammation and less functional overall.