Lymph nodes that remain unchanged for six months may be due to inflammation, tuberculosis or tumor. 1. Inflammation: For example, bacterial infection, viral infection and other microbial infections, these disease-causing factors repeatedly stimulate the lymph nodes will cause chronic lymphadenitis. If the disease is stable, the fibrous tissue will gradually wrap around the lymph node, resulting in the lymph node remaining unchanged for a long time, even for life. 2. Tuberculosis: Lymphatic tuberculosis is more difficult to control, the condition is more complicated, if not treated in time, it will remain in the body and stimulate the lymph nodes repeatedly, which will lead to lymph node swelling for a long time. 3. Tumor: Lymphoma patients with slower growth rate may have swollen lymph nodes that will not grow for half a year without obvious changes. If there is no change in lymph nodes for half a year, it is necessary to do pathological biopsy to understand the nature of lymph nodes and analyze the related reasons before carrying out treatment, so as to avoid delaying the condition and threatening the life.