How long to be swollen after thyroid surgery is analyzed based on the healing of the patient’s incision, as well as the patient’s different medical conditions. First, if the patient’s incision heals well after thyroid surgery and there is no accumulation of fluid or blood under the skin, the swelling in the surgical area will be absorbed within 2-3 days. Second, if after thyroid surgery, there is subcutaneous accumulation of blood, fluid or even infection, at this time, the wound needs to be opened as soon as possible to drain, strengthen the incision dressing, in this case, the swelling of the surgical area often need 5-7 days to recover. Third, if the thyroid gland after surgery, accompanied by nerve damage, blood vessel ligation line detachment, in this case, if necessary, need to enter the operating room again, the local debridement treatment, the thyroid gland after surgery, often need about two weeks of recovery.