If the blood test results indicate normal T3 and T4, but elevated thyroid stimulating hormone, it indicates subclinical hypothyroidism. Treatment for subclinical hypothyroidism includes the following two main aspects: if thyroid hormone is greater than 10 mU/L, start taking oral levothyroxine sodium tablets; if it is less than 10 mU/L but accompanied by hyperlipidemia, it is also recommended to start medication with levothyroxine sodium tablets. Both of these are recommended to start with a small dose, review thyroid function at four weeks, and adjust the drug dose according to the situation. If thyroid stimulating hormone is less than 10mU/L and is not accompanied by hyperlipidemia, regular review is recommended and no starting medication is needed.