Lymph can form lymphatic B cells and lymphatic T cells in the body, and both of these cells can participate in the body’s autoimmunity, which can effectively carry out autoimmunity and kill foreign bacteria or viruses in the body, and can enhance the patient’s resistance and thus reduce the chance of infection in the body, so the role of lymph nodes in the body is still relatively large. Moreover, if local inflammation occurs in lymph nodes, it may lead to enlargement of local lymph nodes, which is also a manifestation of self-repair and self-infection of lymph nodes in the body, and can also indicate local infection in human body. It is suggested that patients can go to the hospital for detailed examination and treatment according to the specific situation to avoid adverse sequelae due to swollen lymph nodes.