Some of the enlarged lymph nodes are not serious, while others are more serious, depending on the cause of the enlarged lymph nodes. If the enlarged lymph nodes are caused by bacterial infection or viral infection, they are less serious and can be treated with antibiotics or antiviral drugs according to the results, and the enlarged lymph nodes can gradually improve and subside. If the enlarged lymph nodes are caused by blood system diseases, such as lymphoma or malignant tumor, such as breast cancer metastasis or thyroid cancer metastasis, it is more serious. It is necessary to actively improve the relevant examination, perform resection of the primary tumor, and then do lymph node dissection, and later may need to give chemotherapy, targeted drug therapy, etc.