Left lower lobe bronchial disruption means that there is a lesion in the lung or bronchus in that area, which leads to airway obstruction, and it may be caused by tumor factors or non-tumor factors, such as trauma or infectious factors. 1. Tumor factors: For example, if the patient suffers from lung cancer, the imaging may show a mass in the hilar region of the lungs and the appearance of bronchial interruption, which may be accompanied by other changes such as obstructive pulmonary atelectasis and other clinical symptoms such as chronic coughing and coughing up sputum, blood in the sputum, and emaciation, and other related symptoms. 2. Trauma: If the patient suffers from trauma and injures the left side of the chest, the bronchial tubes of the lungs may be broken, and then there will be an interruption in the imaging. 3. Infectious factors: Lung infections often do not show bronchial interruption clinically, but if the patient has sputum in the trachea and the sputum obstructs the airway, the imaging of bronchial interruption will appear. If bronchial interruption occurs, it is necessary to go to the regular hospital to clarify the cause of the disease and standardize the treatment under the guidance of the doctor, so as not to delay the condition.