High thyroid hormone in 15 weeks of pregnancy may be caused by transient thyrotoxicosis of pregnancy, Graves’ disease, subacute thyroiditis, etc. Targeted treatments, such as medication and regular checkups, should be carried out under the guidance of the doctor. 1. Transient thyrotoxicosis of pregnancy: high concentration of chorionic gonadotropin will stimulate the thyroid gland’s thyroid receptors, which can cause high thyroid hormones, and generally do not require special treatment, and regular checkups can be. 2. Graves’ disease: need to use antithyroid drugs under the guidance of the doctor, such as propylthiouracil; pregnant patients are not recommended to do iodine radiation therapy. 3. Subacute thyroiditis: Early symptoms of hyperthyroidism may be present, as the disease is a self-limiting disease, the treatment is mainly to alleviate the symptoms, due to the special situation of women in pregnancy, if not necessary, it is not recommended to use medication, to maintain a healthy lifestyle, and strengthen the nutritional support can be. Patients in their 15th week of pregnancy who experience elevated thyroid hormones should go to the hospital and ask their doctor to make a judgment and clarify the cause of the disease.