High free triiodothyronine should be treated in time in the hospital. High free triiodothyronine suspected of hyperthyroidism, you can go to the endocrinology department of the hospital to do a thyroid examination, if accompanied by a decrease in thyroid-stimulating hormone and an increase in FT4, it can be diagnosed as hyperthyroidism. There are three options for the treatment of hyperthyroidism: first, oral treatment of hyperthyroidism medication, medication can reduce side effects, treatment time is long, need to take oral medication for more than a year. Second, radioactive iodine treatment, through the radioactive elements of the thyroid tissue has a certain destructive effect, weaken the function of the thyroid gland, the current method of radioactive iodine treatment of hyperthyroidism. Thirdly, resection of localized thyroid gland, resection of a certain range of thyroid gland can reduce the secretion of the thyroid gland, and resection of an appropriate amount of thyroid gland has a minimal effect on the human body.