If a lung nodule is found to be 13 mm after examination, it is considered to be more serious. It is generally considered that a lung nodule larger than 8 mm is a high-risk nodule with a higher risk of malignancy, and patients are advised to undergo further examination to clarify the nature of the nodule before deciding on treatment measures, and puncture biopsy can be performed if necessary. If the nodule is benign, it needs to be reviewed regularly. If the patient has coughing, coughing sputum or even coughing blood, the possibility of malignant transformation will be higher and the patient should undergo surgery in time. After surgery, the patient also needs to cooperate with chemotherapy to avoid tumor recurrence, and can also cooperate with taking traditional Chinese medicine for conditioning after surgery to increase the effect of treatment. During the treatment period, patients should also maintain a good attitude and actively cooperate with doctors to achieve the purpose of cure.