In some cases, temporary or permanent changes in voice quality or pitch may occur after thyroidectomy surgery. This can be due to the manipulation of the vocal cords or damage to the nerves that control vocal cord function during the procedure. Your surgeon will take precautions to minimize the risk of vocal cord injury. Changes in appearance are typically minimal, but there may be a visible scar on the front of the neck following the surgery. Over time, the scar usually fades and becomes less noticeable.