Frosted glass lung nodule 5mm has a more complex etiology, and its severity is related to the cause of the disease and cannot be generalized. Frosted glass pulmonary nodule 5mm is an imaging finding, which is mainly considered to be related to lung infections, benign tumors and malignant tumors. Usually, ground glass lung nodules caused by benign tumors and lung infections are not life-threatening and not very serious. On the other hand, ground glass nodules caused by malignant tumors of the lungs and other diseases will endanger the patient’s life and are relatively serious. For patients with 5mm ground-glass lung nodules, they should consult a doctor as soon as possible to confirm the diagnosis and follow the doctor’s instructions for treatment.