After thyroidectomy, some patients may experience mental depression, and may also have hypothyroidism, complications such as injury to the recurrent laryngeal nerve, which will affect the normal life of patients. Therefore, for male friends, when the thyroid gland is diseased, the thyroid gland should be retained as much as possible to minimize the impact of thyroidectomy on the body. 1. If the thyroid gland is completely removed, and both sides are removed, patients may experience symptoms such as mental depression due to lack of thyroxine, and need to take oral euthyroxine-like drugs for life. 2. If one side or 2/3 of one side of the thyroid gland is left, the supply of thyroxine secretion in the human body can be basically guaranteed. If the amount is insufficient and hypothyroidism occurs, euthyroxine still needs to be taken orally. 3. After thyroidectomy, the main cause is insufficient thyroxine secretion. Removing only a part of one side of the thyroid gland has no significant impact after surgery and can still lead a normal life. 4. There are also some complications after thyroidectomy, such as injuring the parathyroid gland or injuring the recurrent laryngeal nerve when removing the thyroid gland, which can lead to corresponding complications. 5. If hypothyroidism caused by thyroidectomy is not effectively treated, and is accompanied by infection, trauma, or even some other stress-induced myxedema coma, it may endanger life.