The difference between solid lung nodules and ground glass nodules is the difference in nodule density. Solid lung nodules and ground glass nodules are both imaging manifestations of increased density, the main difference between the two is that the density of the nodules is not the same. Solid lung nodules are more dense and homogeneous, and the lesion will cover the lung parenchyma, i.e., blood vessels and bronchioles are not recognizable; ground-glass lung nodules are less dense and only mildly increased, and blood vessels and bronchioles are recognizable. Ground glass nodules in the lungs can also be categorized into pure ground glass nodules and partially solid nodules. Pure ground glass nodules are those in which the lesion does not obscure the lung parenchyma, while partially solid nodules are those in which the lesion is partially solid, with partially recognizable blood vessels and bronchioles. When lung nodules are found during an examination, one should go to the hospital in time to find out the cause of the disease and strictly follow the doctor’s instructions for treatment to avoid adverse effects.