Fever after one month of enlarged lymph nodes is mostly caused by bacterial infection or viral infection, which can be solved by medication. 1. Bacterial infection: Lymph nodes are the weak defense system of the human body, bacterial infection often affects the health condition, resulting in lymph node enlargement accompanied by a rise in body temperature phenomenon, you can take anti-inflammatory medication orally under the supervision of the doctor, such as cefixime capsules, amoxicillin capsules, levofloxacin tablets and so on. 2. Viral infection: If the invasion of viral infection will involve the lymph nodes, resulting in lymph node enlargement, accompanied by fever symptoms, you can take antiviral drugs, such as ribavirin, acyclovir, four seasons antiviral oral solution and so on. Lymph node enlargement phenomenon, it is recommended that patients pay attention to, and actively go to the hospital for examination, can be based on the results of the examination to take appropriate measures to treat, usually pay more attention to do a good job of preventive measures to reduce the incidence of the disease, to avoid harm to the body.