Clinically, according to the specific causes of hoarseness after thyroid surgery, different treatment methods can often be adopted: a. If the local surgical wound is accompanied by hematoma formation, which compresses the laryngeal nerve and causes hoarseness in patients, the degree of hoarseness in patients is often mild, infrared irradiation at the incision and external application of hot ointment packs can be used to promote faster absorption of the hematoma, and as the local hematoma subsides, the hoarseness in patients can be gradually relieved. The symptoms can be gradually relieved. If the laryngeal nerve is inadvertently clamped during the operation, the patient’s hoarseness often lasts for 3-6 months after the operation, and can improve the local blood circulation and nourish the nerve by injecting Micropo and taking oral blood circulation pills to reduce the patient’s hoarseness. Third, if the laryngeal nerve is inadvertently severed during surgery, even if the nerve anastomosis is performed again, it will not change the symptoms of hoarseness, which will cause lifelong complications for the patient.