Thyroid nodules undergoing ablation may cause hypothyroidism. Thyroid nodules for ablation surgery, for most patients who undergo ablation treatment, the diameter of the nodule is usually smaller, the damage to the patient’s thyroid tissue will be less, resulting in less likelihood of hypothyroidism. However, if it is not well controlled, it will destroy part of the normal thyroid tissue, and if it destroys too much, it will easily affect the patient’s thyroid function and cause hypothyroidism. After the ablation surgery for thyroid nodules, the thyroid function and neck ultrasound should be rechecked according to the doctor’s prescription, and if hypothyroidism occurs, the patient should take medication in time for treatment, such as levothyroxine sodium under the guidance of the doctor for treatment. After ablation of thyroid nodules, patients should follow the doctor’s instructions for regular review, and please consult a doctor in time if discomfort occurs.