Lymph node enlargement after thyroid cancer surgery may be metastasis and proliferation of thyroid cancer or only inflammation of common lymph nodes. If spreading and metastasis of thyroid cancer is suspected, ultrasound examination of thyroid gland and pathological fine needle biopsy and puncture should be carried out in time to clarify the diagnosis, and the diagnosis can be confirmed when malignant tumor cells are found in the lymphocytes obtained. Surgical resection and thorough clearance of lymph nodes from the surrounding tissues are needed again. Regular ultrasound examinations of the thyroid gland are required after surgery, and levothyroxine is taken to prevent underproduction of thyroxine or to suppress overproduction of thyroid stimulating hormone, as prescribed by the doctor. Lymph node enlargement after thyroid surgery may also be caused by inflammation only, anti-inflammatory drugs can be taken for a period of time to observe whether there is any improvement. If you have swollen lymph nodes or other discomfort after thyroid cancer surgery, you should inform your doctor immediately and take appropriate measures.