A 2cm lung nodule that is benign and asymptomatic can be observed for the time being. Symptomatic or malignant nodules can be treated surgically or with a combination of treatments. Most of the lung nodules are focal round-like increased density solid or sub-solid lung shadows with a diameter of ≤3CM, which can appear singly or multiple at the same time, most of them are benign and asymptomatic, and they are usually found during physical examination. 2cm lung nodules can be left untreated for the time being, and they can be rechecked on time. Some benign 2cm lung nodules can obstruct the airways, leading to irritating cough and chest tightness, in which case the lesion needs to be removed by surgery. In addition, for malignant nodules, regardless of the size should be surgically removed, after removal of radiotherapy, chemotherapy and other comprehensive treatment, for inoperable can be radiofrequency ablation treatment. 2cm lung nodules should be communicated with the doctor in time and treated correctly under the doctor’s guidance.