There are often the following clinical reasons for lymph node enlargement: a. Lymph node enlargement caused by infectious lesions, commonly caused by acute tonsillitis resulting in enlarged lymph nodes in the neck, and lymph node enlargement in the lung gate caused by lung infection. Through active anti-infection treatment, the swollen lymph nodes can slowly subside after the inflammation is controlled, and the patient will heal better. Secondly, the enlarged lymph nodes caused by lymphoma may cause swelling of multiple lymph nodes throughout the body. Patients are advised to perform fine needle aspiration or lymph node biopsy as soon as possible to clarify the nature of the lesion. Early chemotherapy treatment is important to help prolong the life of patients. Lymph node enlargement caused by malignant tumor metastasis. For example, lymph node enlargement at the lesser curvature of stomach caused by malignant tumor of stomach invading the small omental sac, and lymph node enlargement at the porta hepatis caused by malignant tumor of liver. It suggests that the patient’s condition is late, even if surgical resection is performed to remove the enlarged lymph nodes, the probability of recurrence of tumor cells after surgery is high.