Thyroid cancer may cause dizziness, and patients with thyroid cancer may have craniocerebral metastasis, causing clinical manifestations of the central system, dizziness, headache, and even numbness of limbs and muscle weakness. If the above symptoms occur, craniocerebral metastasis should be highly suspected, and it is necessary to improve the magnetic resonance examination of the cranium and brain to make a clear diagnosis. Of course, thyroid cancer is a malignant tumor and belongs to consumptive disease, which is prone to emaciation, hypoproteinemia and even cachexia. Patients with poor nutritional status are prone to dizziness, fatigue and other generalized clinical manifestations.