What is emphysema, and is it contagious?

Emphysema refers to abnormal overdistension of the lung tissue distal to the terminal bronchioles, resulting in partial destruction of the airways. In fact, there are several types of emphysema, each presenting with distinct symptoms. So, is emphysema a contagious disease?

Is emphysema contagious?

Emphysema is a pathological condition characterized by increased lung volume and elevated air content in the lungs, primarily caused by alveolar damage and other factors—and it is not contagious. The severity of emphysema varies among individuals and depends on the patient’s specific clinical condition; it is generally non-infectious. Emphysema is a pathological concept that may refer to any pathological change involving increased pulmonary air content due to various causes—such as long-term smoking, air pollution, or even genetic factors. On chest CT imaging, patients may exhibit increased lung air content and/or pulmonary bullae; the severity of emphysema correlates closely with the individual’s clinical presentation.

In its early stages, emphysema may produce no obvious clinical symptoms, with minimal decline in pulmonary function and little impact on daily life—indicating a relatively mild disease course. In contrast, advanced emphysema can significantly impair lung function, leading to pronounced symptoms such as chest tightness and dyspnea, and potentially progressing to complications like respiratory failure—signifying a more severe clinical condition.

In daily life, maintain a regular, balanced diet—avoid spicy or irritating foods, refrain from binge eating, and avoid staying up late. We hope this information has been helpful.