Thyroid function tests require a blood test.
Thyroid function generally includes thyroid stimulating hormone TSH, free thyroid hormone FT4, free triiodothyronine FT3, total thyroxine TT4, total triiodothyronine TT3.
In general, if TSH is significantly decreased and T3, T4, FT4, FT3 are significantly elevated, and at the same time the patient has symptoms such as excessive sweating, irritability, and lethargy, it suggests the presence of hyperthyroidism. If TSH is obviously elevated and T3, T4, FT4, FT3 is obviously lowered, accompanied by symptoms such as emotional indifference, facial edema, weight gain, etc., it suggests the presence of hypothyroidism.
Thyroid function test requires blood sampling, if the result of thyroid function is abnormal, it is necessary to go to the hospital for further diagnosis and treatment.