Solid 6-mm lung nodules are more likely to be due to benign conditions such as misshapen tumors and pneumonia, but there is also some risk that they are due to bronchopulmonary cancer and metastatic lung cancer. Lung nodules are one of the imaging manifestations of the lungs and can be caused by benign diseases such as malignant tumors, granulomas, rheumatoid nodules, etc., and malignant tumors such as bronchopulmonary carcinoma, metastatic carcinoma of the lungs. The risk of malignancy of lung nodules varies with different morphology, size and density. Lung nodules can be categorized into solid nodules, pure ground glass nodules and mixed nodules according to the density of the nodules. Solid nodules have the lowest risk of malignancy, about 7%. Lung nodules smaller than 5 millimeters are usually benign, 6 to 7 millimeters have a smaller risk of malignancy, and nodules larger than 8 millimeters have about a 15 to 20% chance of being malignant. 6mm solid lung nodules are more likely to be benign nodules, but the presence of malignant tumors cannot be ruled out. It is recommended that the patient consult a specialist as soon as possible, make a comprehensive judgment based on other descriptions in the examination report, and follow the doctor’s instructions for further examination and treatment.