If there is no sign of malignant nodule, it can be left untreated for the time being, and regular follow-up observation is sufficient; if it is malignant, corresponding treatment measures need to be taken. If the lung nodule shows obvious malignant nodule features, such as irregular nodule shape edge, burr sign, rich vascular supply of the lung nodule, uneven density inside the nodule, pleural pulling, etc., it is necessary to consider the possibility of malignancy, and it is necessary to combine with the tumor markers to judge. If malignancy is considered, surgical resection or radiotherapy is required. If there are no such features and the nodule is smaller than 8mm, the malignancy may be lower, and generally speaking, no treatment is needed, but close observation and follow-up are required. When a ground-glass lung nodule is first detected, it should be rechecked once in about 3 to 6 months. If there is no change in the nodule, a review once a year is sufficient, and the specific measures should be carried out according to the doctor’s instructions.