If multiple lymph nodes in the neck are caused by infectious factors, the condition is not serious and can be cured with antibiotics. In addition, EBV infection can also cause swollen lymph nodes in the neck, and patients need antiviral treatment with ganciclovir, which can also be cured. Some patients may have tumor-related factors, either primary neck tumors, such as thyroid tumors, or other tumors that have metastasized to the lymph nodes in the neck. In addition, if the lymph nodes are fused and hard, there is a higher chance of lymphoma, which is a painless enlargement of lymph nodes.