Pulmonary nodules are round or irregular lesions ≤3 cm in diameter in the lungs, classified as solid nodules, subsolid nodules, and ground glass nodules. The development of pulmonary nodules may be related to many factors, such as smoking, environmental pollution, slow inflammatory stimulation, and tuberculosis. The discovery of nodules does not necessarily require immediate treatment. The following changes in pulmonary ground glass-like nodules are mostly considered benign nodules in the follow-up: 1, those with significant changes in the external features of the lesion in a short period of time; 2, those with uniform or faded density; 3, those with shrinking or disappearing lesions in the presence of increasing density; 4, those with rapidly enlarging lesions with a doubling time of <15 days; 5, those with solid nodular lesions that remain stable for more than 2 years. However, if the following changes occur, lung cancer or malignancy will be considered more often: 1. the increase in diameter and doubling time is in accordance with the law of tumor growth; 2. the lesions are stable or increase in size and emerge as real components; 3. the lesions shrink but emerge as real components or increase in real components; 4. angiogenesis is in accordance with the law of lung cancer, etc.; 5. lobulation, burr or pleural wrinkles appear. The above is the content of the Chinese Expert Consensus on the Diagnosis and Treatment of Pulmonary Nodules. The growth of pulmonary nodules is consistent with malignant features, so it is important to pay attention to it and go to a regular hospital in time to make a diagnosis and treatment plan so as not to miss the best time for treatment.