Frosted glass nodules 0.9 cm may be treated with surgery or regular review depending on the benign or malignant nature of the nodule. Generally speaking, for a 0.9 cm ground-glass nodule, it is necessary to be alert to the possibility of early-stage lung cancer, especially for people with a history of smoking and a family history of lung cancer. If the nodule shows signs such as burr, lobulation, vascular truncation sign, and vacuolar sign, it is recommended to improve the relevant examinations such as lung puncture biopsy; if malignancy is highly suspected, it is also possible to opt for thoracic surgical treatment. If the ground-glass nodule is benign, accompanied by cough, fever, chest pain, chest tightness and other symptoms, consider the lung infection, can be anti-infective treatment, after the recovery of inflammation, some of the patients’ nodules can be gradually reduced, and continue to regular review can be. It is recommended that patients with 0.9 cm ground-glass nodules should consult a doctor in a timely manner, and continue to improve the relevant examinations or regular review as prescribed by the doctor, so as to clarify the cause of the disease and treat the cause of the disease.