Small nodules in the right upper lung need to be judged based on the size and nature of the nodule. Pulmonary nodules are divided into three cases: ground glass nodules, partially solid nodules and solid nodules. If the nodule is less than 5 mm, it is mostly benign nodule and can be left untreated without clinical manifestations, and a dynamic annual follow-up with high-resolution CT is sufficient. If the nodule is between 6-8mm or even larger than 8mm, accompanied by lobar, short burr, pleural traction sign, pleural depression sign and other changes, it is necessary to be alert to the possibility of early lung cancer, and to give enhanced CT examination of the chest and, if necessary, percutaneous lung puncture cell biopsy to understand whether lung cancer has occurred. Therefore, small nodules in the right upper lung need to be identified as benign or malignant nodules, and nodules larger than 8mm need to be given high attention and early intervention treatment by thoracic surgery if necessary.