Enlarged cervical lymph nodes are related to local inflammation, metastatic malignant tumor and the appearance of malignant lymphoma, as follows: 1. Local inflammation: enlarged cervical lymph nodes are usually caused by local inflammation, and in the acute stage, redness, swelling, heat and pain will appear. After anti-infection treatment, the lumps will disappear, while patients with chronic diseases will have a longer course and will not feel pain. 2. Metastatic malignant tumor: it is a factor leading to enlarged lymph nodes in the neck. It is characterized by hard texture, poor activity and no pressure pain, etc. Nasopharyngeal cancer and tonsil cancer mostly metastasize in supraclavicular lymph nodes, and nasal, sinus and facial cancer often invade submandibular lymph nodes. 3. Malignant lymphoma: it is a kind of painless, progressive enlargement, hard texture, poor activity of lymph node enlargement, malignant lymphoma is mostly bilateral, and the systemic manifestations may include high fever, large liver and spleen, emaciation and fatigue. There are many reasons for the appearance of cervical lymph nodes, and it is recommended that patients should be admitted to hospitals, improve relevant examinations, clarify the cause of the disease, and carry out targeted treatment.