A ground glass nodule 7mm is not particularly serious if it is only a benign lesion, but it is more serious if there is a risk of malignancy. Ground glass nodules are mostly benign lesions, if the size of the nodule is 7mm, it belongs to a relatively small nodule, usually related to inflammation and infection, through timely and effective anti-inflammatory and anti-infection, the nodule will be reduced in size, and you need to quit smoking during the treatment. However, it is not excluded that the ground glass nodule will have lesion changes. Regarding the nodule formed by malignant tumor, the size of 7mm is more serious, if not treated in time, the tumor grows faster, and the cancer cells will metastasize and spread, which will be life-threatening in serious cases. Lung lobectomy should be done as soon as possible, and then lymph node dissection should be performed. It is suggested that patients should go to the hospital for timely consultation and relevant examination to avoid delaying the condition.