Coughing one month after lung nodule surgery may be the result of irritating cough caused by the postoperative lung incision and postoperative respiratory tract infection, which can be treated according to the doctor’s instructions. Lung nodule surgery usually removes the local lung tissue or lung lobe including the lung nodule, and then repair the incision with suture. After the lung incision is repaired, foreign materials such as threads will remain, and scar will be formed after the wound is healed, which will irritate the bronchial tubes and cause irritating dry cough. Symptomatic treatment with cough suppressant drugs (codeine, strong lozenges) is available. Lung nodule surgery is a major surgery, surgical trauma, the body’s resistance will decline, easy to complicate respiratory infections, such as upper respiratory tract infections, pneumonia, etc., may appear cough, cough sputum, fever and other symptoms, can be sought for medical treatment, anti-infective (cephalosporin antibiotics), cough and phlegm (aminoglutethimide) symptomatic treatment. Coughing one month after lung nodule surgery, it is recommended to consult a doctor for a clear diagnosis and standardized treatment, and the use of drugs should be under the guidance of a professional doctor.