Ground-glass micronodules, as long as they do not continue to grow, are not serious and regular follow-up is sufficient. If there is a tendency for the ground-glass nodules to increase in size, they may be caused by malignant tumors, which is a bit serious. Ground glass nodules in the lungs may be inflammatory nodules caused by pathogenic microorganisms, or calcified foci left after the cure of pneumonia or tuberculosis, as long as they do not continue to increase in size, they are not serious. If the grinding glass nodules in the lungs continue to grow and become larger, they may be a bit serious, and it is necessary to cooperate with a specialized doctor to carry out puncture biopsy as soon as possible, so as to exclude the possibility of malignant nodules in a timely manner. Therefore, it is not possible to accurately determine whether a ground-glass nodule is serious or not from the size of the nodule, and it is recommended to improve the next step of puncture biopsy in a timely manner in order to clarify the nature of the nodule in conjunction with the guiding opinion of a professional doctor.