Whether a lung nodule of 7 millimeters needs to be treated surgically depends on the nature of the nodule. Lung nodules may be caused by tuberculosis, infection, tumors, etc. If the diameter of the lung nodule is 7mm and it is a solitary lung nodule, it may be a localized calcified foci left after the cure of tuberculosis, which usually does not affect the lung function and does not show clinical manifestations, and usually does not need to be treated by surgery. 7mm nodules generally can not be punctured to confirm the diagnosis, small nodules are generally through the imaging morphology, density and other characteristics to determine whether the malignant or benign. Lung nodules 7 mm is recommended to go to the hospital for a comprehensive examination, according to the severity of the disease targeted treatment.