Microscopic glass nodules in the lungs should be called microscopic ground glass nodules in the lungs, meaning that the patient has imaging changes of ground glass nodules on the film when doing chest X-ray or chest CT. Small nodules can be benign or malignant, depending on the nature and size will be divided and take different treatment strategies, as follows: 1, if the grinding glass nodule diameter > 5mm, it is recommended to follow up after three months; 2, if the nodule grows after three months of follow-up, it is recommended to further surgery or other active treatment; 3, if the nodule has not changed or shrunk, it is recommended to continue follow-up, such as the second If there is no problem again, the next follow-up will be extended to one year. If the diameter of the nodule is always <5mm, we can directly suggest annual follow-up and review the chest CT once a year.