First of all, in most cases, the standard surgical procedure for thyroid tumors is not to remove a simple mass. The reasons for using this procedure are mostly due to concerns about the complications of thyroid surgery, such as not having to take medication (i.e., thyroxine preparations) after surgery, and concerns about nerve damage and parathyroid gland damage. However, due to the multiplicity and uneven growth of thyroid tumors or nodules, nearly half of the patients who undergo this type of simple mass removal will have a recurrence or reoccurrence within 5 to 10 years. This procedure has been abandoned internationally, but it is still used in many regions of China due to regional imbalances and opinions. Another reason for recurrence is the refusal or failure to take thyroxine tablets after surgery. Many patients and even doctors currently believe that taking thyroxine orally after thyroid surgery is unacceptable. Don’t worry too much about the so-called side effects of the drug, if you don’t take the drug orally, it will easily cause the recurrence of tumor or nodule in a short period of time. As long as the dosage is appropriate, there will be no significant side effects. Therefore, I would like to briefly communicate with you about the problem you have raised. I hope it will be helpful to you. Of course, there are signs of recurrence on the opposite side now. Then please check the above to see where the problem lies.