High thyroid stimulating hormone (TSH) after thyroidectomy is considered to be postoperative hypothyroidism or subclinical hypothyroidism, where the body’s thyroid cells are insufficient to store thyroxine and the body’s thyroxine cannot meet the body’s metabolic needs. During the treatment period, we should pay attention to nutrition, supplement with high protein foods, stay away from soy products and greasy foods, and supplement with seafood and iodine-containing foods as appropriate. Regular thyroid color ultrasound examination, pay attention to rest and not to strain.