The presence of enlarged lymph nodes in the neck and their persistence for three months is not necessarily the so-called lymphoma. There are very many groups of lymph nodes in the neck, which exist in the mouth, nose, ears and even eyes, and are connected with the outside world, and there is often chronic inflammation, which can cause inflammatory reactive hyperplasia of lymph, and the swelling of lymph nodes in the neck appears, and some of them last for a long time because inflammation rises and falls, and there is often no clinical symptom if there is swelling of lymph nodes. In addition, the lymph nodes that appear are hard in texture and are clearly adherent to each other, with no obvious pressure pain. In this case, if the condition is combined with fever, significant weight loss, or even anemia and bleeding, the doctor will conduct a detailed examination, including the use of a biopsy of the lymph nodes, to help make a definitive diagnosis. Enlarged lymph nodes in the neck are most commonly due to reactive hyperplasia caused by chronic inflammation, which may be helped to be clearly diagnosed by something like blood tests, or ultrasound of the lymph nodes, or biopsy of the lymph nodes, but most of the cases are not lymphoma.