Dizziness after total thyroidectomy may be caused by undissipated anesthesia, hypothyroidism, high blood pressure and so on. 1. Non-dissipation of anesthesia: Total thyroidectomy requires a certain dose of anesthesia, which may cause dizziness after waking up due to non-dissipation of anesthesia or side effects of anesthesia. 2. Hypothyroidism: After the total thyroidectomy, it may lead to the lack of thyroid hormone synthesis and secretion, which will lead to the phenomenon of hypothyroidism, and there may be dizziness, drowsiness, skin dryness and so on. 3. High blood pressure: If the patient himself suffers from high blood pressure, after the total thyroidectomy, it may also lead to dizziness. When the patient has the phenomenon of dizziness after total thyroidectomy, it is recommended to consult a doctor for timely examination, identify the cause of the disease, and then give targeted treatment under the guidance of the doctor.