There are many reasons for thyroid cancer patients to have fever and high temperature in hands and face, which may be caused by postoperative infection, cancer metastasis or complications. 1. Post-operative infection: For thyroid cancer patients, if the fever and high temperature appear after operation, the most likely cause is due to post-operative wound infection or poor drainage, at this time, they need to go to the hospital actively, apply antibacterial drugs, treat the wound in time and change the medicine regularly. 2. Cancer metastasis: once thyroid cancer has lung metastasis, it may be followed by lung inflammation, resulting in lung infection, coupled with the poor immune function of the patient’s body, it will be easy to have high fever and other symptoms, and it is necessary to go to the hospital actively for consultation and symptomatic treatment. 3. Complications: once patients with advanced thyroid cancer have skin ulceration, bleeding, infection, etc., those with serious infection will have high fever, so they need to be treated in time, have the lesions removed and control the body temperature. Patients with thyroid cancer need to have regular checkups, and if there is any discomfort, please consult the doctor in time, so as to avoid delaying the condition.