The feeling of recovery after laryngeal nerve injury is the gradual restoration of hoarseness, that is, the return to normal articulatory function. In clinical thyroid surgery, such as major thyroidectomy or radical thyroid cancer resection, the complication or injury is the injury of the recurrent laryngeal nerve, but the possibility of medical injury such as ligation or cutting of the recurrent laryngeal nerve is usually unlikely, because the scar compression affects the recurrent laryngeal nerve when the local scar heals after thyroidectomy. Therefore, the patient’s voice may be slightly hoarse for a short period of time after surgery, for example, 2-3 days after the surgery, but 4-5 days later. For hoarseness caused by local scar compression of the recurrent laryngeal nerve, local physiotherapy or no treatment is needed to restore the local scar tissue and gradually restore the pressure on the recurrent laryngeal nerve, so that the hoarseness will be relieved and return to normal.