Lymph nodes are the immune organs of the body and will increase in size in response to inflammation. Enlarged lymph nodes under the ear are mostly caused by local inflammation, including otitis media, rhinitis, cold, fever, fire, toothache, pharyngitis, etc. The causes of enlarged lymph nodes include inflammation, tuberculosis, and tumors. More than 90% of the causes of enlarged lymph nodes are inflammation, so most enlarged lymph nodes do not require special treatment. If the swollen lymph nodes under the ear are accompanied by pain, you can take oral cephalosporin anti-inflammatory drugs for 5-7 days; if the pain is not obvious, you do not need any treatment.