Hoarseness after total thyroidectomy may be due to damage to the recurrent laryngeal nerve during the operation, which usually recovers in about 3~6 months. The exact time needs to be decided according to the individual’s physical condition and postoperative care. If the laryngeal recurrent nerve is only slightly bruised, this condition can be treated with nerve-nourishing drugs, such as methylcobalamin, and will usually improve within 3 months. If the injury is severe, the recovery time is much longer, up to about six months to a year. If the recurrent laryngeal nerve is cut off during surgery, recovery is usually not possible. After total thyroidectomy, you should go to the hospital regularly for follow-up, keep observing your body’s recovery, and take reasonable treatment under your doctor’s guidance.