The causes of swollen lymph nodes are varied, and can be hematologic diseases, tumor-related diseases, or infectious diseases such as viral infections, bacterial infections, or parasitic infections, so it is possible that multiple departments mentioned above may be involved in the case of swollen lymph nodes. If you do not have any other discomfort and only have swollen lymph nodes, you may consider registering for general surgery for the time being, because the general surgeon may arrange for ultrasound, puncture, or biopsy of the lymph nodes concerned. If the swollen lymph nodes are accompanied by a fever, you can either register with the hematology department or with the infection department.