Swollen lymph nodes in the neck is not necessarily a false alarm. Causes of swollen lymph nodes in the neck include inflammatory enlargement, lymph node tuberculosis and tumors, etc., which need to be treated under the guidance of a physician to clarify the cause of the disease. 1. Inflammatory enlargement: that is, lymphadenitis, mainly caused by a variety of pathogenic infections and acute and chronic inflammation of the lymph node drainage area, mostly caused by bacterial infections (such as Aureobasidium, Streptococcus haemolyticus, etc.). For example, tonsillitis, pharyngitis, chronic lymphadenitis, etc. lead to enlarged lymph nodes in the neck, and the enlarged lymph nodes can be touched in the neck. 2. Lymph node tuberculosis: If you have this disease, you can feel the lymph nodes in the neck, and you may have systemic symptoms, such as low-grade fever, night sweats (sweating abnormally after going to sleep, but sweating stops after waking up), and body wasting. A tuberculin test will reveal a positive result, sometimes in combination with other tuberculosis foci, such as pulmonary tuberculosis. 3. Tumor: Commonly found in lymphoma. Lymph node enlargement caused by lymphoma is mainly superficial lymph node enlargement of the whole body. It may also be metastatic lymph node enlargement of malignant tumors, such as breast cancer, lung cancer and other metastases. Lymph node enlargement in these cases is serious and requires active treatment.