Lymphoma, also known as lymphoma, is a malignant tumor of the human immune system, often with swollen lymph nodes as the first symptom at the primary site. The most common symptom of lymphoma behind the ear, that is, cancer of the lymph nodes behind the ear, is swollen lymph nodes behind the ear, which are often painless, and the swollen lymph nodes are often hard in texture, while there is no obvious pressure pain, and if the lymph nodes are pushed, they are often not easy to push. However, if the lymph nodes grow rapidly in a short period of time, that is, when the disease progresses more rapidly, painful lymph nodes may also occur. In addition to localized lymph node enlargement, patients with lymphoma behind the ear sometimes have symptoms of generalized hypermetabolism, with some patients exhibiting generalized symptoms such as fever, emaciation, night sweats, and weakness. In addition, some patients may experience itching of the skin all over the body, and some may also experience pain in the lymph nodes after drinking alcohol.