The number of days after surgery for malignant thyroid nodules can be discharged from the hospital, depending on the patient’s own repair ability and whether the patient has serious complications after surgery. 1. If the patient’s own repair ability is strong, the volume of malignant thyroid nodules is small. Lymph node dissection is not required during surgery, the surgical trauma is relatively small, and patients do not have complications related to incisional effusion, hoarseness, and hypocalcemic convulsions after surgery. Patients reach the standard of discharge in about 3 days after surgery, and even some large hospitals in China currently adopt day surgery for malignant thyroid nodules and can be discharged on the second day after surgery. 2. If the patient has a large volume of malignant thyroid nodules, lymph node dissection is required during surgery, the surgery is more traumatic, and the patient’s own repair ability is poor, and complications related to blood accumulation in the incision, hoarseness, and low calcium convulsions may occur after surgery. The hospital stay will be significantly longer in this case.