Thyroid Function Test 7 is a common thyroid function test, including Thyrotropin, Triiodothyronine, Thyroxine, Free Triiodothyronine, Free Thyroxine, Antithyroglobulin Antibody, Antithyroid Peroxidase Antibody. 1. Thyrotropin: It is a sensitive indicator of thyroid function. Elevation is seen in hypothyroidism, while decrease is seen in hyperthyroidism and subclinical hyperthyroidism. 2. Triiodothyronine: used to evaluate thyroid function. Elevation is seen in hyperthyroidism, subacute thyroiditis, etc. Decrease is seen in hypothyroidism, autoimmune thyroiditis. 3. Thyroxine: produced by the thyroid gland. It is elevated in hyperthyroidism and pregnancy, and lowered in hypothyroidism and cirrhosis. 4. Free triiodothyronine: a hormone synthesized and secreted by follicular cells of the thyroid gland, elevated in hyperthyroidism and lowered in hypothyroidism. 5. Free thyroxine: it is a sensitive indicator of thyroid function in vitro test, elevated in hyperthyroidism, Graves’ disease, etc.; lowered in hypothyroidism. 6. Antithyroglobulin antibody: a common indicator for the diagnosis of autoimmune thyroid disease. 7. Anti-thyroid peroxidase antibody: a common indicator for diagnosing chronic autoimmune diseases. Positive antibodies can be found in patients with Hashimoto’s thyroiditis, postpartum thyroiditis, atrophic thyroid, and partial nodular goiter. When patients find abnormal thyroid function, they should consult a doctor in time, improve the thyroid color ultrasound examination, and further clarify the diagnosis under the guidance of the doctor. In life should quit smoking and drinking, pay attention to rest, appropriate exercise, reasonable diet.