Milky nodules in the lungs is a description of the lesions in the lungs by CT examination, and the main causes of the relevant manifestations include tuberculosis, metastatic tumor, silicosis, tuberculosis and so on. 1. Tuberculosis: mainly refers to hematogenous disseminated tuberculosis, which will appear in the lungs with multiple corn-grain nodules and accompanied by the most obvious low-grade fever, night sweating and weakness. 2. Metastatic tumor: if there is a history of primary tumor, and there are multiple granular nodules in the lungs, it is very likely to belong to metastatic tumor, which belongs to the manifestation of advanced stage of the tumor. 3. Silicosis: it is related to the nature of work, prolonged exposure to dust, leading to the appearance of silicosis nodules in the lungs, which will appear as multiple granular nodules, accompanied by enlargement and calcification of lymph nodes next to the lungs. 4. Nodular disease: non-caseous granulomatous tissue formation in the lungs can also lead to related manifestations, and prolonged poor control may lead to interstitial fibrosis. The presence of multiple granulomatous nodules in the lungs, accompanied by obvious symptoms such as cough, chest pain, fever, etc., need to consult a doctor in a timely manner, and after diagnosing the condition through clinical examination and tests, standardized treatment under the guidance of clinicians.