Lung dilatation is also known as bronchial dilatation, whether it is serious or not depends on the size and area of the lung dilatation, etc. Mild is not serious, and moderate to severe is more serious. When the lung expansion is mild focal expansion, the patient in a quiet state, there can be no clinical manifestations, only in strenuous exercise, there can be mild wheezing, chest tightness, shortness of breath and other symptoms, can be relieved by appropriate rest, do not need special treatment, you can also do some appropriate exercise to improve cardiopulmonary function. If the lung expansion is moderate, severe two lungs large expansion, the patient in a quiet situation has shortness of breath, chest tightness, fatigue and other manifestations, the presence of severe cases of obvious hypoxia, cyanosis and other symptoms, such a situation need to consult a doctor in a timely manner, in accordance with the doctor’s instructions for treatment. It is recommended that patients with pulmonary expansion go to a regular hospital in time to listen to the advice of a professional doctor.