How long it will take for the lungs to become diseased depends on the nature of the nodule and cannot be generalized, there is no clear time prediction. Frosted glass nodules in the lungs are caused by chronic lung infections or lung tumors. 1. Chronic lung infections: Frosted glass nodules in the lungs may be caused by chronic lung infections, which can be treated actively against the primary disease and will not appear as lesions. 2. Lung tumors: if it has been clear that the grinding glass lesions in the lungs are caused by lung tumors, there is no such thing as time. For small nodules and no risk factors of lung ground glass nodules, it is generally recommended to go to the hospital for regular review, to keep abreast of the situation of the nodules and take appropriate treatment according to the situation of the nodules.