Whether or not to operate on a benign 2cm pulmonary nodule depends on whether or not the pulmonary nodule shows signs of malignancy or enlargement. 1. If a 2cm benign pulmonary nodule is confirmed by relevant examinations, and there is no obvious increase in size after long-term clinical follow-up, it can continue to be followed up and observed, and surgery is not necessary at this time. Usually, inflammatory benign nodules are the most common, and can be eliminated through anti-infective medication as prescribed by the doctor. 2. If the nodules are found to be increasing in size during follow-up, even benign nodules need to be treated by surgical resection, because benign nodules may become malignant after a certain degree of enlargement. Therefore, regardless of the size of the lung nodule, benign or malignant, you should actively go to the hospital and follow the doctor’s advice and treatment to avoid progression of the disease.