After thyroid cancer surgery, first of all, patients should maintain a more optimistic and positive attitude to understand the disease correctly. Any cancer is related to emotion, if you have the right attitude, you will have a better result. Secondly, in terms of diet, patients are usually asked to do low iodine diet or no iodine diet, if they have partial resection, they can eat low iodine diet, if they have total resection, they can eat no iodine diet, and they should take medication and eugenol in the morning. Protein-based foods at breakfast, such as milk, soy milk, tofu, etc., can be put into 4 hours after noon and taken after noon. Do not eat these things at breakfast so as not to affect the absorption and efficacy of the medication. Remember to always review after surgery, review is very important for the patient, review is necessary. It is important for patients to review their nail function 4-6 weeks after surgery, which is something every patient should do. The main purpose of checking the nail function is to adjust the medication, to see whether the medication is taken and whether the existing dose of medication is appropriate, and if it is appropriate after six months, it is OK to check the nail function basically once after six months. Generally, ultrasound is done after 6 months after surgery, but there are reports in the literature that patients with thyroid cancer will have recurrence and metastasis after 6 months, i.e. after 6 months, so it is not more meaningful to check ultrasound too early. Furthermore, patients should pay attention to their wounds, especially patients, who are usually discharged from the hospital 2-3 days after surgery, so they should pay attention to whether there is redness and swelling in the wounds, whether there is any possible accumulation of fluid or blood, and if there is any local discomfort, they should return to the hospital to seek medical consultation. Many patients ask the question of whether they can take a shower after thyroid cancer surgery, because there is a wound in the thyroid gland, most of them require that they can take a shower in half a month and a shower after 1 month. During the review process, for patients with medullary carcinoma, calcitonin and CEA, or carcinoembryonic antigen, should be checked especially, along with PTH, or parathyroid hormone, and blood calcium and calcium phosphorus levels. For patients with intermediate and advanced stages, iodine-131 treatment is needed. Iodine-131 treatment is generally better the earlier it is done, and most people now believe that it is fine as long as it is done within six months.