The difference between micronodules and small nodules in the lungs is mainly manifested in the differences in nodule size, probability of malignancy, and treatment methods. 1. Clinically, lung nodules with a diameter of less than 5 millimeters are generally referred to as micronodules, and those with a diameter of 5 to 10 millimeters are referred to as small nodules. 2. In several lung cancer screening tests, it is found that the probability of malignancy of lung micronodules is 0% to 1%, and the probability of malignancy of small nodules is 6% to 28%. 3. It is generally recommended that chest CT should be repeated in 1 year for micronodules, and chest CT should be repeated in 3 months or half a year for small nodules according to the specific conditions of the nodules, and surgical resection can be taken as early as possible if malignant nodules are suspected. The difference between pulmonary micronodule and small nodule, it is recommended to go to the hospital to find a professional doctor to consult or diagnosis and treatment.