Benign ground glass refers to benign pulmonary ground glass nodules found on examination. Diseases that clinically cause the corresponding condition include inflammation, allergic reactions, mycobacterial infections, alveolar hemorrhage, and interstitial lesions. 1. Inflammation: Mild inflammation leads to localized exudation, which may result in the formation of ground glass-like changes. 2. Allergic reaction: after exposure to allergens, localized exudative lesions in the alveoli can be caused, further leading to the development of ground-glass lesions. 3. Mycobacterial infection: mycobacteria multiply in the lungs, affecting the surrounding lung tissue and causing ground-glass changes. 4. Alveolar hemorrhage: it is closely related to trauma and abnormal coagulation, and the occurrence of intra-alveolar hemorrhage will lead to the production of ground-glass lesions. 5. Interstitial lesions: mainly related to the immune system disease, the lungs have metabolic inflammation, will appear glassy lesions. A large proportion of benign ground-glass lesions can be recovered through standardized treatment, but if they continue to be unimproved, or even if the scope of the lesion worsens, it is necessary to consult a doctor in time, and standardized treatment should be carried out under the guidance of the clinician.