Surgery is recommended based on specific scan findings, such as large nodules, a goiter, or suspected malignancy. While not an immediate emergency, undergoing the procedure within the advised timeframe prevents future complications. If your entire thyroid is removed, you will need to take a daily thyroid hormone replacement medication, like levothyroxine, for the rest of your life. This medication safely replaces the hormones your body can no longer make, allowing you to live a completely normal, healthy life. If only a portion is removed, daily medication may not be necessary. Please discuss the specific details of your scan with your doctor to make the best decision.