1, fasting on the day of surgery, fluid in the 2nd d after surgery, drinking plain water for the first time to prevent choking and aspiration of lungs; 2, continue to take compound iodine solution for 7 d after hyperthyroidism, and reduce 1 drop each time daily until stopping for those who take 15 drops; 3, long-term thyroxine tablets are needed after bilateral subtotal or total thyroidectomy; 4, observe for twitching of hands and feet, tonic twitching and numbness of muscles around the face, mouth and lips and the soles of the hands and feet, and should Give supplemental 10% calcium gluconate or calcium chloride 11- 20ml, oral calcium in mild cases, and control foods containing high calcium and phosphorus in the diet, such as milk, fresh soy milk, egg yolk, fish, etc. (1) It is advisable to eat more foods with high iodine content, such as kelp, nori, hairy vegetables, light vegetables, dried shellfish, razor clams, jellyfish, sea cucumber, lobster, scallop, mackerel, fish maw, ark, clam, turtle. (2) It is advisable to eat more food with the effect of eliminating swelling, including rhizome, taro, rape, mustard, kiwi. (3) It is advisable to eat more foods with immunity-enhancing effects: shiitake mushrooms, mushrooms, fungus, walnuts, barley, red dates, yams. Avoid smoking and alcohol. Avoid spicy and stimulating foods, such as onion, garlic, pepper, chili, cinnamon, ginger, etc. Avoid fatty and fried foods.