Lower lobe atelectasis of the right lung refers to lung atelectasis, whether it is serious or not is related to its etiology, ordinary inflammation or trauma caused by relatively not serious, tumor caused by generally more serious. 1. Inadequate control of common inflammation or trauma can lead to massive inflammatory exudation, resulting in thickening and edema of part of the bronchial wall, which affects the bronchial patency of the lower lobe of the right lung and causes atelectasis. In addition, the presence of pleural effusion can also cause adjacent tissue compression of pulmonary atelectasis. Overall, it is a benign lesion, which can be recovered through anti-infection treatment and drainage, and is usually not serious. 2. Tumor compresses and infringes on the adjacent bronchial tubes, which directly leads to bronchial stenosis or occlusion and causes right lower lobe atelectasis, which will seriously affect the physical condition and is a more serious condition, which needs to be treated in combination with the staging of the tumor. Patients with right lower lobe atelectasis are advised to seek timely medical treatment and standardize the treatment under the guidance of clinicians.