Patients with advanced lung cancer have swollen face mainly because the tumor itself presses the corresponding blood vessels, and also presses the venous vessels through lymphatic transfer, or causes poor venous return in the head, thus causing swelling of the face, which is also called superior vena cava syndrome in medical science. This phenomenon is also called superior vena cava syndrome in medical science. In addition to swelling of the face, the appearance of superior vena cava syndrome in patients with advanced lung cancer can also cause the anger of superficial veins, causing cyanosis and even chest tightness, shortness of breath and difficulty in breathing. Therefore, it is necessary to actively carry out anti-tumor therapy, including radiotherapy, chemotherapy or targeted therapy, in the advanced stage of lung cancer. When facial swelling occurs, diuretic and dehydrating drugs can also be used according to the actual situation to provide some degree of relief.