If a lung nodule needs to be removed, the indication for surgery is based on its benign or malignant nature. If the nodule is benign and grows slowly, with a diameter of 2 cm or less, it can be kept under observation. If the nodule is malignant, such as lung cancer, squamous, adenocarcinoma, small cell or large cell carcinoma, it needs to be removed urgently after detection. Because lung cancer metastasizes and spreads quickly and has a high mortality rate, the earlier the treatment, the better the result. If the nodules show symptoms of compression and infiltration, such as compression and invasion of phrenic nerve, causing diaphragm palsy, compression of laryngeal recurrent nerve and hoarseness, compression of vena cava or esophagus and jugular vein anger and difficulty in swallowing, they need to be treated surgically.