Lung CT nodules with clear lobulated edges suggest pathological changes in the lungs, which may be benign pathological changes such as pulmonary tuberculosis, tuberculosis, pneumonic pseudotumor, or malignant tumors of the lungs, which can seriously endanger the patient’s life and health. 1. benign pathological changes: may be tuberculosis, tuberculosis, fungal infections or benign tumors and other diseases, will cause lung function damage, causing patients to appear dyspnea, hemoptysis, cough and other manifestations, but also may be tuberculosis, which belongs to the infectious diseases, in addition to the patient’s own lung function will have an impact on the patient, if not treated in a timely manner may be infected with the surrounding family and friends. 2. Malignant tumor: Lung cancer can seriously endanger patients’ life and health. If not treated in time, besides affecting the respiratory system, it can also be transferred to other organs, causing damage to the function of other organs. If nodules appear in lungs, it is necessary to go to the hospital in time to find out the cause and get timely treatment, so as not to jeopardize the patient’s life and health.