Grinding glass nodules on the lungs are most often considered to be caused by chronic lung inflammation, including long-term smoking and exposure to dust, such as chefs, hairdressers, tailors, as well as masons and coal miners. Once formed, small ground glass nodules in the lungs are detected early by CT and require further dynamic follow-up depending on the size and nature of the nodule. If the nodule is less than 5mm, it is a benign nodule with chronic inflammatory changes and does not require special treatment. If the nodule is 6-8mm or even larger than 8mm, accompanied by lobar, pleural pulling sign, pleural depression sign, short burr and other changes, it is necessary to be alert to the occurrence of early lung cancer in this ground glass nodule. Therefore, pulmonary ground glass nodules are mainly caused by long-term exposure to chronic inflammation and need to be dynamically followed for the occurrence of early carcinoma, which is generally mostly benign change.