Whether a right upper lobe nodule of 17 x 15 mm is serious or not needs to be analyzed according to the nature of the nodule and the clinical symptoms produced by the patient. The right upper lobe nodule is an abnormal pathological change in the localized lung parenchyma. If the nature of the nodule is benign, and the patient does not have obvious abnormal symptoms, or simply has a cough, the situation is not particularly serious, and it is considered to be a benign lesion. If the nodule in the upper lobe of the right lung is malignant, and the patient has obvious symptoms such as dyspnea or chest pain, the situation is more serious, and it is not excluded that the patient needs to be treated through surgery as soon as possible to prevent the condition from worsening in the later stage. When there are abnormal pathological changes in the lungs, it is necessary to go to the Department of Respiratory Medicine, first examined to clarify the specific cause of the disease and the nature of the disease, and then choose a treatment plan. Attention should be paid to controlling the development of the disease, restoring the respiratory function as much as possible, and preventing the problem of complications.