Lung cancer is a very common malignant tumor of the respiratory system. If lymph node metastasis occurs in the mediastinum around the lungs or in the hilum, it is generally judged as stage II or III lung cancer, i.e. advanced lung cancer. Carcinomatous lymphadenitis is a special manifestation of lung metastasis occurring from tumor. Late metastasis of tumor tissues causes growth and spreading of lymphatic vessels, so that lymphatic vessels are filled with tumor cells and fibrous tissues around lymphatic vessels are proliferated. Inflammation caused by the spread of lesions from the hilum to the periphery. If cancerous lymphangitis is manifested by edema of the lower limbs with fever, the patient should be supplemented with nutrition in time, and needs to quit smoking and drinking to protect the immune organs with immunotherapy. Prevent cancer and metastasis of cancer cells. When the patient develops cancerous lymphangitis, he should relax and go to the hospital in time for treatment under the guidance of the doctor. Avoid causing complications that lead to the onset of adverse consequences.