Multiple lymph nodes are found 6 months after thyroid cancer surgery, which are recurrent metastasis of thyroid cancer, normal lymph nodes, adverse reaction of anticancer drugs and so on. 1. Thyroid cancer recurrence and metastasis: because of the history of thyroid cancer surgery, the presence of multiple lymph nodes should be considered as the possibility of recurrence and metastasis of thyroid cancer due to incomplete clearance of lymph nodes during the surgery, it is recommended to go to the hospital in time, and the diagnosis can be confirmed by further histopathological biopsy. 2. Normal lymph nodes: the appearance of lymph nodes may also be caused by inflammation and other reasons leading to reactive hyperplasia of lymph nodes. Attention should be paid to regular review and follow-up observation. 3. Adverse reaction of anticancer drugs: Paclitaxel, platinum and other anticancer drugs can stimulate the proliferation of many kinds of cells and lymph nodes, so the appearance of lymph nodes after thyroid cancer surgery may also be the adverse reaction of anticancer drugs. If the above symptoms occur, it is recommended to go to professional hospitals to clarify the cause of the disease and then under the guidance of doctors for further examination and treatment.