Obstructive pneumonia does not cause lumps on the lungs, but lumps on the lungs can cause obstructive pneumonia. 1. Obstructive pneumonia is an infection of the lungs that develops due to a space-occupying lesion in the lungs that blocks a localized trachea or bronchus, causing sputum and other secretions to be unable to be expelled. 2. Lung masses, whether benign or malignant, can cause obstructive pneumonia. Masses can block the trachea and bronchial tubes locally and cause infection, which is one of the main causes of obstructive pneumonia. Failure to treat the mass in a timely manner can result in recurrent cases of obstructive pneumonia. Therefore, it is recommended to seek timely medical treatment for obstructive pneumonia, and at the same time, follow the doctor’s instructions for examination to exclude the possibility of lung cancer and other diseases.