The danger of chronically enlarged lymph nodes is that they can put the body in a state of exhaustion, which can lead to malignant disease and even endanger the patient’s life. Long-term enlargement of lymph nodes can often be caused by lymphatic metastases, lymphoma and other hematologic diseases, but also may be lymphatic tuberculosis, chronic lymphadenitis. These diseases will make the patient’s body in a state of depletion, may also lead to malignant disease, and even life-threatening in serious cases. Normally, the diameter of lymph nodes is between 0.2 and 0.5 cm, and if the diameter or volume of large lymph nodes increases when examining superficial lymph nodes in various parts of the body, then the lymph nodes are enlarged. It is recommended that patients should pay attention to the enlargement of lymph nodes for a long period of time and go to the hospital as soon as possible for blood tests and other tests to clarify the cause of the disease, and then treat the disease under the guidance of the doctor. Lymph node patients should develop good habits in daily life, avoid staying up late and overwork, quit smoking and drinking, and maintain proper exercise every day, such as jogging, swimming and so on, to enhance their own immunity.