Coughing after lobectomy may be due to irritation from tracheal intubation, irritation during surgery, and postoperative pleural effusion. Lobectomy is for irreversible lesions in the lungs, which are surgically removed for therapeutic purposes. 1. Tracheal intubation irritation: tracheal intubation during general anesthesia leads to an increase in the sensitivity of the mucous membrane in the airway, which can cause coughing and other symptoms. 2. Stimulation during surgery: the original physiological environment in the thoracic cavity is changed during surgery, or the nerves in the lungs are affected when lobectomy is performed, which causes postoperative cough symptoms. 3. Postoperative pleural effusion: there will be pleural effusion in the chest cavity after surgery, which may trigger cough symptoms. Postoperative pulmonary function exercise should be strengthened, which can accelerate the absorption of pleural fluid and accelerate the recovery process of cough. If the cough is not relieved or aggravated, you should consult a doctor in time to avoid delaying your condition.