The growth of pulmonary nodules is a common clinical phenomenon, and patients need to consult their clinicians according to the CT report. If the nodule is considered benign, it may be due to inflammation or alveolar hemorrhage, which is not a cause for concern and will subside on its own. If a nodule is suspected to be malignant or if the nodule is not judged to be benign or malignant, and the nodule grows suddenly in size, the patient needs to pay attention to it and take the film and consult with the doctor in a timely manner. Because the sudden growth of nodules in this case is usually caused by tumor growth, active intervention is needed.