Lung nodules of 17 millimeters are clinically large and surgical removal is usually recommended. Currently, most lung nodules smaller than 5 mm are considered to be benign, and those larger than 8 mm need to be periodically reviewed for malignancy. If a lung nodule of 17 mm is present, it is highly suspected to be related to long-term inflammation or tumor in the lungs, and biopsy pathology must be taken in time to clarify whether it is malignant or not. If the nodule is not malignant for the time being, comprehensive consideration is needed. If the nodule is large, it may obstruct and compress the trachea or bronchus, resulting in chest tightness, shortness of breath or even dyspnea, and also has a high degree of malignancy, so it is recommended to take thoracoscopic minimally invasive resection of the nodule. If there are no symptoms for the time being, it can be closely observed. If the examination of the nodule shows malignant changes, surgery, chemotherapy or radiotherapy will be given after systemic evaluation. Patients are advised to go to regular hospitals as soon as possible to find out the nature of the nodule and take further symptomatic treatment, do not make judgment on your own, so as not to delay the treatment of the disease.