A small nodule in the upper lobe of the right lung is considered to be inflammatory, and dynamic observation is recommended, meaning that possibly this nodule is due to an inflammatory infection and is not a true tumor. Dynamic observation means that you need to go to the hospital regularly for review to compare whether the nodule has changed or enlarged. Inflammatory nodules are mostly due to lung infections and are formed as a result of increased localized exudation, soft tissue hyperplasia, and inflammatory encapsulation of the lung tissue, resulting in nodule-like changes. Lung infections that can lead to nodule formation include bacterial infections and viral infections. The nodules may shrink or disappear with anti-infection or anti-viral treatment. Dynamic observation of nodules in the lungs means reviewing the CT of the lungs every 1 month, 3 months and 6 months to observe the changes in the size of the nodules. Analyze the small nodules and intervene as early as possible if there is a tendency to increase in size or the possibility of malignant changes. If small nodules are found in the upper lobe of the right lung, it is recommended to go to the hospital to avoid delay.