The location of the swollen lymph nodes depends on which department the lymph nodes are located, as follows: 1. If the lymph nodes are swollen in the upper part of the neck, it may be a parotid gland infection or a submandibular gland infection, which requires a visit to the ENT department. 2. If the lymph nodes in the axilla are swollen and the patient is female, it may be caused by breast disease, so you need to consult with breast surgery or general surgery. 5. If the lymph nodes in the popliteal fossa are swollen, you may need to go to orthopedics for examination and consultation. In short, if you really don’t know which department to go to, you can ask at the consultation desk or see the emergency department, and the doctor will have a preliminary judgment and then provide a more appropriate department to see the patient.