Thyroid cancer (thyroid carcinoma) is often treated by total thyroidectomy and subtotal thyroidectomy, and common postoperative complications include dyspnea, asphyxia, hoarseness, lowered pitch, choking on drinking water, and hypocalcemic convulsions. Postoperative dyspnea and asphyxia are mostly seen within 2 days after surgery, which is commonly caused by insufficient hemostasis in the operation area, hemorrhage compression of the trachea, and partly due to the softening of the trachea wall by the long-term compression of the enlarged thyroid gland, and tracheal collapse after the thyroid gland is removed. Hoarseness is commonly caused by injury to the recurrent laryngeal nerve, with an incidence of about 0.5%. Most of them are due to damage during surgery and usually recover gradually after physical therapy. Decreased pitch and choking on drinking water are caused by injury to the superior laryngeal nerve during surgery, and often recover on their own after physical therapy. Hypocalcemic convulsions are caused by accidental injury to the parathyroid glands during surgery. Calcium supplements are usually given, and the remaining parathyroid glands can play a compensatory role in 2-3 weeks, and the symptoms will disappear. Intraoperative parathyroid transplantation can also be done. Patients who experience discomfort after thyroid surgery should communicate positively with their treating physician for appropriate treatment with a view to early recovery.