Thyroid cancer patients who take oral eugenol for a long period of time after surgery will, in principle, require long-term calcium supplementation. After thyroid cancer surgery, the thyroid gland is partially or completely removed. The secretion of thyroid hormone in the body will be significantly decreased or impaired, so it is necessary to take Eucerin for a long period of time to replenish the thyroid hormone in the body. Long-term use of Euthyrox patients, the body’s calcium absorption will be impaired. It is not excluded that some patients are not affected by calcium. Therefore, in principle, calcium should be supplemented for a long period of time, but if the biochemical examination shows that the calcium in the body is within the normal range, supplementation may not be necessary. In addition to calcium supplementation through medication, it is also recommended that dietary supplements be taken and more calcium-rich foods be consumed, and it is recommended that adjustments be made under the guidance of a doctor.