A small nodule with ground glass density in the upper lobe of the right lung suggests chronic lung infection, which does not need to be overstressed, and only needs to be initially judged according to the size of the nodule to determine its status. If the pulmonary ground glass nodule is smaller than 5mm or even less than 3mm, it is considered to be a tiny nodule, mostly benign, and does not require special treatment, and a high-resolution CT of the chest once a year is sufficient. If the right upper lung ground glass nodule is between 6-8 mm and shows growth changes, it is necessary to be alert to whether the nodule has malignant changes. If the nodule is larger than 8mm, accompanied by lobar, short burr, pleural depression sign, pleural pulling sign, etc., it indicates that the nodule may have developed lung cancer changes, and further chest enhancement CT and percutaneous lung puncture examination should be performed if necessary to clarify whether the nodule is cancerous as soon as possible and ask the thoracic surgeon for early surgical intervention and treatment.