Lung nodules that grow from 5.4 to more than 7mm in six months indicate that the nodules are growing fast and there is a higher possibility of malignancy. Lung nodules can be caused by lung inflammation, infection or tumor. For inflammatory nodules, after anti-infective treatment, such as cefprozil, amoxicillin and other antibiotics, the nodules can disappear on their own in most cases, and it is difficult to show a trend of continuous growth. If the lung nodule grows from 5.4mm to 7mm in half a year, it mainly indicates that the nature of the nodule is bad, such as the nodule is inclined to lung cancer may continue to increase in size, so you can carry out a puncture biopsy of the tumor that has become bigger, so as to determine the nature of the tumor, and then guide the subsequent treatment. Therefore, a lung nodule that grows from 5.4 to 7 mm in six months may be more serious and requires treatment according to the specific situation.