The presence of a ground glass nodule in the upper lobe of the right lung is mostly suggestive of chronic lung infection in the upper lobe of the right lung. The size and nature of the nodule needs to be further defined. If the nodule is less than 5 mm it is mostly benign and does not require special treatment, only dynamic follow-up of high-resolution CT for 1 year to assess whether the nodule is growing and changing. If the nodule is between 6-8mm it needs to be followed up once in 3 months to find out if the nodule has changes such as short burrs, lobulation, pleural traction sign, pleural depression sign, etc. Once there are changes, be alert to the possibility of early cancer in this ground glass nodule. If the nodule is larger than 8 mm, with lobarization, pulling sign, short burr and other changes, further chest enhancement CT should be done for early detection of carcinoma and surgical intervention in thoracic surgery. In conclusion, the right upper lobe ground glass nodule is mostly benign, and the possibility of malignancy needs to be further evaluated in conjunction with the size and growth changes of the nodule.