After thyroid tumor surgery, the following diets should not be eaten: First, foods that are too spicy, such as chili peppers, spicy fries, spicy hot pot, etc. Secondly, alcoholic beverages should not be consumed. Third, it is not recommended to eat diet with high fat and high cholesterol content, such as red meat, fatty sausage, squid, egg yolk, etc. Fourth, it is not recommended to eat foods that are difficult to digest and easily form hard stools, such as dried vegetables, dried mushrooms, dried beans, etc., because when constipation occurs the abdominal pressure increases, which can lead to local bleeding again. There are other dietary considerations that can be consulted with the attending surgeon of the surgery. After surgery, it is appropriate to consume more vitamin and fiber-rich foods such as fruits and green vegetables, and to consume more high-quality protein such as fish and shrimp, which will help the body recover.