Whether the lung enlargement is serious or not depends mainly on the specific condition and etiology of the disease. Clinically, the lung enlargement mainly refers to obstructive emphysema and pulmonary alveoli, and the main common diseases are chronic obstructive emphysema and chronic pulmonary heart disease. At this time, due to the decrease of elastic retraction force of alveoli, if the lung enlargement is more obvious and large, there are different degrees of ventilation and air exchange dysfunction at this time, which causes respiratory failure over time, which is very serious. If the lung enlargement is very mild and relatively small in scope, not enough to cause significant respiratory distress, this time is not serious, and should be carried out early to improve pulmonary ventilation and ventilation function, try to improve cardiopulmonary function, the condition can be alleviated.