Multiple lung nodules are generally more likely to be benign. Multiple pulmonary nodules with better nodule morphology, smoother, and no signs of malignancy such as lobulation or burring are usually benign. The most common cause is lung infection, but it may also be lung old lesions, pulmonary nodular disease, tuberculosis, etc.. If a lung infection is suspected, the patient can fight the infection for two weeks and then be reviewed. If there is no change, the patient should have a regular review, such as a lung CT in three months. if there is still no change, a lung CT in six months. after that, if there is still no change, have a regular review under the guidance of a doctor. Malignant nodules in the lungs are mostly single nodules with ground glass-like nodules. If the lung metastasis of malignant tumors, it can be multiple nodules. The proportion of multiple nodules of malignant tumors is relatively small, and a clear diagnosis needs to be made by pathological examination of the nodules. It is recommended that patients with multiple pulmonary nodules go to the hospital in time to avoid delaying their condition.