Multiple nodules in the lungs is a diagnostic imaging feature that suggests the possible presence of multiple nodular lesions in the lungs, which may be caused by infectious lesions in the lungs, pneumoconiosis due to occupational exposure, rheumatologic immune disorders, tuberculosis, lung cancer or metastases, and chronic inflammation. 1. Infectious lesions of the lungs: some patients may be associated with infectious lesions of the lungs, such as tuberculosis or fungal infections. Such patients need active anti-infective treatment. For example, anti-tuberculosis drugs such as isoniazid, rifampicin and pyrazinamide can be used for tuberculosis. Lung fungal disease can be treated with voriconazole, itraconazole, amphotericin B and other drugs. 2. Pneumoconiosis: Pneumoconiosis caused by long-term exposure to hazardous dust at work can also lead to the formation of multiple nodules in the lungs, and the first step in treatment is to stay away from polluted environments, while anti-fibrotic treatments such as hanfenacin and pirfenidone can be used. 3. Rheumatoid immune disease: single or multiple nodules appear in the lungs, which is the manifestation of rheumatoid nodules in the lungs. Treatment is mainly based on the treatment of rheumatoid arthritis. 4. Nodular disease: the etiology of the disease is unknown at present, and the imaging manifestation can be tiny nodules distributed along the bronchial vascular bundles, which can be fused into a ball. Asymptomatic nodular disease with normal lung function does not require treatment. Nodular disease that presents with significant intrapulmonary or extrapulmonary symptoms requires treatment with glucocorticoids, such as prednisone. 5. Lung cancer or metastatic tumor: Multiple nodules in the lungs can not be excluded from lung cancer or metastatic tumor, and the nodules in such cases will increase in size with the change of time, and generally need to be treated with surgery, radiotherapy or chemotherapy according to the tumor condition. 6. Chronic inflammation: some patients have localized tissue hyperplasia, which may be related to chronic inflammation, such as air pollution, long-term smoking, etc. Such patients do not need special treatment. These patients do not need special treatment, but should pay attention to controlling various risk factors, such as quitting smoking, staying away from dusty environments, and undergoing regular chest CT examinations. Multiple nodules in the lungs can be caused by a variety of diseases, and patients are advised to seek prompt medical attention to clarify the cause of the disease, and under the guidance of a physician for treatment or regular follow-up.