When only TSH is elevated, subclinical hypothyroidism is usually considered. If TSH is severely elevated (severe subclinical hypothyroidism), symptoms of hypothyroidism, hyperlipidemia or atherosclerotic disease, preparation for pregnancy, pregnancy, etc., medication needs to be considered. When only TSH is elevated but T3 and T4 are normal, subclinical hypothyroidism is generally considered. Subclinical hypothyroidism generally does not require special treatment, and regular review is sufficient. However, if there is a severe elevation of TSH, hyperlipidemia, symptoms of hypothyroidism, associated atherosclerotic disease, preparation for pregnancy, pregnancy, etc., you need to consider medication, such as levothyroxine. It is recommended to go to the hospital and ask the doctor to make a judgment when there is only TSH elevation.