A small nodule with a diameter of 6mm is seen under the pleura of the anterior segment of the upper lobe of the right lung, benign nodule is not serious, if it is malignant nodule is more serious. The volume of 6mm lung nodule is very small, and it is difficult to determine its nature, which can be followed by regular CT examination to pay attention to the dynamic changes of the nodule, which can be preliminarily determined by the change of nodule volume, patient’s age, and bad life habits combined with family genetic history and tumor history. Volume: only a small part of 6mm nodules are lung cancer, which can be reviewed regularly, generally 3-6 months to review the CT examination to observe the development of nodules, if the nodules are growing fast, it is necessary to determine the nature of the nodules, and surgical resection if necessary. At this time, it is more serious. If the nodule does not change much, CT examination can be repeated in 6-12 months, which is not serious at this time. Close observation can be. 2, the patient’s age: the older the patient, the higher the probability of malignancy of the nodule will increase accordingly, especially the elderly lung nodule malignancy probability is significantly higher than that of young people, so the lung nodules of the elderly to pay more attention. 3, bad habits: long-term smoking can increase the malignant probability of lung nodules, long-term smokers should also pay attention to. 4、Family heredity: if there is an immediate family member who suffers from lung cancer, the chance of children suffering from lung cancer is significantly higher than that of those who do not have any immediate family member suffering from cancer. 5、When lung nodules are found in people with other malignant tumors, the possibility of lung metastasis of malignant tumors should be considered as a priority. It is more serious at this time. When lung nodules are found, especially small nodules, there is no need to panic and go to regular hospitals to receive regular examination and treatment, so as to achieve early detection and early treatment.