Pregnant women with high thyroid-stimulating hormone may have clinical or subclinical hypothyroidism during pregnancy. Pregnant women with high thyroid-stimulating hormone can eat nutritious food such as green leafy vegetables, chicken, duck, fish, eggs and milk, and they need to pay attention to a diversified and balanced diet. Food does not have the function of treating the disease, and specific treatment plan is recommended to consult a professional doctor. If high thyrotropin is accompanied by free thyroxine less than the lower limit of the reference range in pregnancy, clinical hypothyroidism is considered, and levothyroxine treatment is required. If high thyrotropin is present with free thyroxine levels within the pregnancy-specific reference range, consider the possibility of subclinical hypothyroidism. Pregnant women with subclinical hypothyroidism may benefit from treatment and, therefore, levothyroxine therapy may be indicated in pregnant women with subclinical hypothyroidism. Pregnant women with high thyroid-stimulating hormone are advised to consult a medical professional for diagnosis and treatment.