Multiple micronodular shadows in the right lung refers to the number of ≥2 nodules with a diameter <5 mm in the right lung found by imaging, which are mainly considered as lung infection, tuberculosis, lung tumor, pulmonary nodular disease, etc. 1. Lung infection: Infection by pathogenic bacteria such as Staphylococcus aureus and Streptococcus pneumoniae can lead to lung inflammation or even lung abscess, resulting in multiple tiny nodules or patchy shadows in the right lung. 2. Tuberculosis: caused by Mycobacterium tuberculosis infection, which is a special case of lung infection, such as the number of tuberculosis bacilli entering the blood circulation is high, and the resistance of the body is weak, which can lead to cornual tuberculosis and the appearance of multiple tiny nodules in the right lung. 3. Lung tumors: benign tumors, such as malignant tumors, can also be seen in malignant tumors, such as primary tumors. It can also be seen in malignant tumors, such as primary bronchopulmonary cancer or metastatic lung cancer, and the microscopic nodules can be in the form of burrs or lobes. 4. Pulmonary nodular disease: it is a kind of interstitial lung disease, which manifests as multiple small nodules along the bronchial blood vessels, and may involve one lung or both lungs. When the examination found that the right lung multiple micronodular shadow, should be timely under the guidance of the doctor for further examination, to clarify the cause of the disease and then treatment, so as not to delay the condition.