There is no one indicator of the seven thyroid function tests that is terrible, each has a certain clinical significance. The seven thyroid function tests generally include five thyroid hormones, namely thyroid stimulating hormone (TSH), total thyroid hormone (T4), free thyroxine (FT4), total triiodothyronine (T3) and free triiodothyronine (FT3), and two thyroid-related antibodies, namely anti-thyroid peroxidase antibodies and anti-thyroglobulin antibodies. These seven tests can help determine thyroid function and thyroid disease. For thyroid hormone abnormalities, the following conditions may occur: elevated FT3 and FT4 and decreased TSH may be seen in hyperthyroidism; decreased FT3 and FT4 and increased TSH are usually seen in hypothyroidism; decreased FT3, FT4 and TSH at the same time may be associated with pituitary abnormalities and systemic diseases; and abnormal detection of related antibodies may determine thyrotoxicosis and autoimmune thyroid disease. The test can determine whether the patient has thyrotoxicosis, autoimmune thyroid disease, etc. Therefore, when thyroid hormone levels are found to be abnormal in a thyroid function test, no matter which value is abnormal, it should be taken seriously. Let the doctor make a comprehensive judgment after combining the patient’s symptoms and completing other related tests, so as not to delay the disease and affect the treatment.