Lung nodules of 2 cm need to identify the nature of the nodule before corresponding treatment, and if it tends to be a malignant tumor, it needs to be treated with surgical resection. 1. Lung nodule is not a specific name of a disease, and the severity of the disease cannot be judged solely by lung nodules. Lung nodules are an imaging term for nodular shadows in the lungs that appear on CT or chest radiographs. When determining the nature of a nodule on imaging, in addition to the size of the nodule, the shape of the nodule and the rate of growth also need to be based on a combination of judgment. 2. When 2cm nodules are found in the lungs, the possibility of malignant tumors should be considered, and puncture biopsy can be performed first for pathological diagnosis to clarify whether it is a malignant tumor; or thoracic surgery can also be consulted to clarify the pathology after surgical resection. When 2cm lung nodules are found, it is recommended to consult a specialist as soon as possible to standardize the diagnosis and treatment, so as to avoid delaying the condition.