The seven items of thyroid blood test mainly include thyrotropin, free T3, free T4, total T3, total T4, as well as anti-thyroglobulin antibody and anti-thyroid peroxidase antibody. The seven items of thyroid blood test can be used to determine whether the thyroid function is normal or not, and whether the lesion is in the pituitary gland or the thyroid gland.1. Thyrotropin: TSH is a hormone secreted by the pituitary gland, which regulates the blood supply to the thyroid gland as well as the synthesis and secretion of thyroid hormones. Elevated values generally suggest hypothyroidism, while lower values generally suggest hyperthyroidism; 2, free T3: free T3 is a hormone synthesized and secreted by thyroid follicular cells, and elevated values of free T3 generally suggest hyperthyroidism, while lower values imply the possibility of hypothyroidism; 3, free T4: elevated values of free T4 are generally seen in thyrotoxicosis, chronic lymphocytic thyroiditis, and other conditions that may be associated with the presence of a thyroid gland. Lymphocytic thyroiditis with hyperthyroidism and other diseases, if reduced to consider the possible existence of nephrotic syndrome and other diseases; 4, total T3: the existence of hyperthyroidism, the total T3 can be several times higher than the normal value, the total T3 is common in hypothyroidism; 5, total T4: total T4 value of the elevation of the hyperthyroidism, acute hepatitis and other diseases, the value of the lower means that A lower value means that hypothyroidism and hypopituitarism may exist. 6. Antithyroglobulin antibody: Antithyroglobulin antibody is TGAb, if TGAb is positive, it is considered to be the disease of chronic lymphocytic thyroiditis, recurrence of thyroid cancer, and hypothyroidism, etc. 7. Antithyroid peroxidase antibody: TPOAb, the value of TPOAb is usually seen to be higher in chronic lymphocytic thyroiditis, acute hepatitis, and hypothyroidism. The elevated value of TPOAb is usually seen in chronic lymphocytic thyroiditis, hyperthyroidism and other diseases.