Serum thyroid stimulating hormone (TSH) 9.1μIU/ml, consider the possibility of subclinical hypothyroidism, if the patient is accompanied by symptoms of hypothyroidism, TPOAb positivity, dyslipidemia, or atherosclerotic disease, then thyroid hormone treatment should be given; if the patient is not accompanied by the above, then regular monitoring of the TSH should be carried out under the guidance of the doctor. Subclinical hypothyroidism often has no obvious symptoms or signs, and may show symptoms of hypothyroidism, such as fatigue, fear of cold, dry skin, and lack of energy, etc. Laboratory tests may show only elevated serum TSH levels, with normal FT3 and FT4 levels. When TSH is elevated, it means that subclinical hypothyroidism may exist. It is recommended to go to the hospital and have the doctor judge whether treatment is needed according to TSH level and whether there are symptoms of hypothyroidism, follow the doctor’s instructions, and don’t take it lightly or take medication on your own.