Hyperthyroidism T3T4 normal TSH low whether to continue to take medication, need to combine specific indicators to determine, can not be generalized. If the patient’s TSH persists <0.1mIU/L, it is strongly recommended to receive antithyroid therapy in the following cases: age ≥ 65 years; the presence of risk factors for heart disease or combined heart disease; combined with osteoporosis and so on. Hyperthyroidism patients due to excessive thyroid hormones can cause hypermetabolism, resulting in T3, T4 rise with TSH decline, when hyperthyroidism patients follow the doctor’s instructions to use methimazole, propylthiouracil and other antithyroid drugs treatment, can make T3, T4 drop to normal levels. T3T4 normal TSH low hyperthyroidism patients should not blindly stop treatment, should go to the hospital, under the guidance of the doctor to reduce drugs, stop drugs.