Whether a 7mm ground-glass nodule is serious or not depends mainly on whether the ground-glass nodule is malignant or not; benign nodules are generally not serious, while malignant nodules are more serious. 1. The probability of malignancy of ground glass nodule 7mm is not more than 10%, if there is no obvious imaging signs of malignant lung nodule (lobular sign, burr sign, pleural pull sign, vascular cluster sign), can be closely followed up in outpatient clinic, and it is recommended to review the chest CT at 3, 6, 12 and 24 months, and then turn to the routine annual follow up if there is no change, and then consider benign nodule if there is no change. 2. 7mm ground glass nodule if chest CT is highly suggestive of malignant tumor, can be evaluated by physician after lung puncture biopsy. 7mm ground glass malignant lung nodule belongs to the early stage of lung cancer is more likely, can be radical resection, the surgical effect is better. It is recommended to go to the thoracic surgery department of a regular hospital for further consultation and diagnosis if the 7mm ground glass nodule is to be treated.