Lung glass nodules should be referred to as lung ground glass nodules. Some of the ground glass nodules are not serious, while others are more serious, depending on the size, location and nature of the ground glass nodule. If the nodule is small, within 5 millimeters, the condition is not serious. It may be due to localized inflammation, and some nodules are self-healing. If the nodule is large and has an abnormal shape, the possibility of cancer is more serious. Ground-glass nodules in the lungs are not serious if they occur in the surrounding lung tissue and do not exert pressure on the surrounding tissue. If it occurs in the hilar area, it is more serious if it puts pressure on the surrounding tissues. Therefore, it is necessary to make a comprehensive analysis to determine whether ground-glass nodules in the lungs are serious or not, so as to avoid delaying the treatment and causing the condition to deteriorate, which is not conducive to the health of the body.