Lymph node fusion refers to lymphadenitis or lymphatic tuberculosis, in which the lymph nodes break down or adhere to each other when the infection is severe, and the adhesions form sheets or bead-like nodal masses. Lymph node fusion occurs when the body is infected by bacteria or viruses, or when the autoimmune system becomes diseased, resulting in an increase in the number of cells in the lymph nodes, enlargement of the lymph nodes, and then adhesion to each other, resulting in lymph node fusion. There are many factors that can cause lymph node fusion, including various types of lymphadenitis and tuberculosis cells can cause fusion. Lymphoma, lymphoblastic leukemia, lymphatic metastasis of malignant tumors and other malignant lesions will invade part of the lymph nodes. Tumor cells proliferate in these lymph nodes, and the lymph nodes gradually enlarge, and finally are able to fuse together into a mass. It is recommended to go to the hospital in time when the lymph nodes are fused, and follow the doctor’s instructions to carry out standardized treatment after clear diagnosis of the cause of the disease, so as to avoid delaying the condition.