Thyroid nodules usually require a thyroid pentameter test. By determining the function of the thyroid gland, it will initially clarify the nature and type of thyroid nodules, which will help to further examine and clarify the cause of the disease for treatment. Commonly, thyroid nodules are categorized into simple goiter, thyroid adenoma and thyroid cancer as follows: 1. Simple goiter: diffuse enlargement of the thyroid gland caused by iodine deficiency in the body, and the thyroid function test can detect whether the patient is combined with hyperthyroidism, so as to facilitate further treatment. 2. Thyroid adenoma: a benign tumor originating from the follicles of the thyroid gland, generally through the thyroid function five, check whether the patient has hyperthyroidism. If hyperthyroidism is present, the patient may further need to undergo a thyroid nuclear scan to determine whether the patient has a high-functioning thyroid adenoma, which will facilitate the subsequent selection of an appropriate treatment plan. 3. Thyroid cancer: malignant tumors of the thyroid follicular epithelium or follicular parafollicular cells, generally through the thyroid function of the five items to determine the patient’s thyroid function, which will help to determine the subsequent treatment options. In conclusion, the thyroid nodule examination is inseparable from the thyroid function five items, thyroid function five items is the more basic examination of thyroid function. At the same time, there are other thyroid function tests, such as thyroid function triple test and thyroid function seven test, the contents of which are slightly different, and the specific need to do which kind of test needs to be judged by a professional physician.