Lung nodules are treated differently depending on the size and nature of the nodule. If the size of the nodule is between 1mm-3mm, observation is preferred and regular review is required. If the size of the nodule is between 4m-6mm, observation is the mainstay for solid nodules; observation is preferred for ground-glass nodules, with regular review, and surgery can be considered when the nodule changes. If the size of the nodule is between 7mm-10mm, surgical treatment is preferred if there is a typical ground glass or mixed ground glass shadow; if it is a solid nodule, observation is preferred and surgical treatment is considered when changes occur. If the size of the nodule is between 10mm-30mm, regardless of benign or malignant, surgical treatment is required. If the imaging manifestation is typical benign lesions (such as calcification, etc.), observation can be considered as the mainstay of treatment, and surgical treatment should be considered for any nodule whose benign or malignant nature cannot be clarified before surgery. Lung nodule is a common disease in clinic, once it occurs, you should go to the hospital in time, and be diagnosed and treated under the guidance of professional doctors.