Lymph nodes are present in every person, and they are present in all parts of the patient’s body. This is when the lymph nodes circulate locally through the lymphatic vessels, forming a lymphatic network. The circulation in this case is basically synchronized with the blood circulation, which can effectively carry out the local anti-inflammatory effect. In this case, the patient’s resistance can be strengthened, and thus the chance of infection can be effectively reduced. The distribution of lymph nodes is mainly located in the axillary lymph nodes, cervical lymph nodes and inguinal area lymph nodes. The lymph nodes in these three areas are generally more densely distributed. And if local inflammation occurs, it will cause the lymph nodes in these areas to become enlarged, and there may also be painful symptoms. Therefore, it is recommended that patients must be actively examined and treated symptomatically after a clear diagnosis to avoid adverse sequelae caused by inflammation that is difficult to control.