There are no 6 major causes of swollen lymph nodes in the neck, but swollen lymph nodes in the neck can usually be related to infection factors, rheumatic immune factors, tumor factors, etc. 1, infection factors: lymph nodes are immune organs, after the body is infected by inflammation, lymph nodes in the neck can increase due to immune response, common bacterial infections, viral infections, etc., bacterial infections such as tuberculosis, viral infections such as herpetic stomatitis, etc. Generally use antibiotic treatment, the size of lymph nodes can return to normal after the inflammation subsides; 2, rheumatic immune factors: If patients suffer from some rheumatic immune diseases, such as rheumatoid arthritis, systemic lupus erythematosus, etc., can also appear the symptoms of enlarged lymph nodes in the neck. Rheumatoid arthritis patients can be treated with hydroxychloroquine, penicillin and other drugs, and systemic lupus erythematosus can be treated with methylprednisolone, prednisone and other drugs; 3. Tumor factors: some primary tumors can lead to swollen lymph nodes in the neck, such as malignant lymphoma, which is generally painless to press, and the swollen lymph nodes are hard and can be connected into blocks. At this time, under the guidance of professional doctors, cetapenem, ibrutinib and other drugs can be used for treatment, and at the same time, surgery is feasible to remove them, and generally the swollen lymph nodes can be relieved after active treatment. In addition, tumor cells can metastasize through lymphatic system and metastasize to the neck, which can lead to swollen lymph nodes in the neck, i.e. secondary tumors, which are generally hard in texture and poorly demarcated from surrounding tissues, and need to be treated in different ways according to the condition under the guidance of professional doctors. 4. allergies, etc., the symptoms of enlarged lymph nodes in the neck can also appear.