Thyroid cancer surgery without lymphatic metastasis does not need to do iodine-131. Iodine-131 is mainly used to kill cancer cells after thyroid cancer surgery, which can reduce the chance of metastasis of cancer cells to a certain extent. If there is no lymphatic metastasis after thyroid cancer surgery, it proves that the cancer cells have not metastasized, so there is no need to do iodine-131 at this time. After surgery, patients should keep the wound dry and clean, change medicine on time to avoid wound infection, and also take amoxicillin capsules, roxithromycin dispersible tablets or moxifloxacin tablets under the guidance of professional doctors, which can effectively alleviate the patient’s condition, and pay attention to dietary regularity, and reasonably mix meat and vegetables. Patients are advised to go to the hospital for regular checkups, and if there is any discomfort, they should seek immediate medical attention.