Multiple pains in the body after thyroid cancer surgery are not necessarily due to the occurrence of metastasis, it may be the case that the lymph nodes have been cleared during the surgical removal process, which causes the pain, but it is not ruled out that metastasis of thyroid cancer has occurred, and specific judgment is needed. Painful incision may occur after the completion of surgery for thyroid cancer, due to the fact that the surgery will clear the lymph nodes of some of its surrounding tissues, leading to the damage of nerves, which will cause the situation of pain in multiple places. When thyroid cancer cells develop bone metastasis, pain in the lower back and legs and other parts of the body may occur, which needs to be diagnosed through pathological biopsy and local puncture for thyroglobulin testing to confirm whether metastasis has occurred. Post-operative thyroid cancer patients should have regular check-ups in their daily life to understand their condition and seek medical treatment in time when abnormalities occur.