If you eat or drink, the test results will be affected, which may not reflect the changes in the body’s condition and affect further treatment. Functional disorders include hyperthyroidism and hypothyroidism, while organic disorders include nodular goiter, thyroid adenoma, thyroid cyst and thyroid cancer. The thyroid gland should be reviewed by routine thyroid ultrasound and fasting blood tests for thyroid function to observe the level of thyroid hormone secretion. If the thyroid gland is hyperthyroid, anti-thyroid medication is required. If the thyroid gland is hypothyroid, oral eugenol should be taken to promote thyroid secretion. An ultrasound examination of the thyroid gland should be performed to check for nodules and other occupational diseases in the thyroid gland.