Lymph nodes in the neck can be first seen in respiratory medicine or infection department, because the most common is bacterial infection or viral infection, usually combined with fever, headache, body aches and swelling, etc., which can be clarified by routine blood tests, neck ultrasound, chest imaging, etc. If there is a combination of tooth pain, you need to see a dentist because it may be caused by pericoronitis or periodontal abscess of wisdom teeth. If there is no fever but multiple enlarged lymph nodes in the neck, you need to see a hematologist or rheumatologist as it may be due to autoimmune system or lymphoma. If the lymph nodes are enlarged in combination with a dry cough, you should see a cardiothoracic surgeon, which may not exclude the possibility of pulmonary occupancy.