Thyroid nodule malignancy is potentially curable with surgery and is cured by surgical removal with iodine 131 as well as with medication. Malignant thyroid nodules may grow rapidly over a short period of time, and lymph node metastases may occur as the thyroid cancer grows aggressively. Patients with malignant thyroid nodules may experience hoarseness, dyspnea, and difficulty swallowing, as well as diarrhea, palpitations, flushing of the face, and decreased calcium levels. Malignant thyroid nodules need to actively cooperate with the doctor under the guidance of the doctor for surgery, regular follow-up after surgery, with iodine 131 radiation therapy, but also with medication, such as levothyroxine sodium tablets for treatment. The dosage of levothyroxine sodium tablets should be adjusted according to the five functions of the thyroid gland. When patients have the above symptoms, go to the hospital in time for examination and diagnosis, and under the guidance of the doctor for treatment and medication, do not use medication privately, in order to avoid adverse consequences.