Hyperthyroidism (Hyperthyroidism) is a common endocrine disease caused by excessive secretion of thyroid hormones. It is an autoimmune disease. Pregnant women with improperly controlled hyperthyroidism, stress during delivery or surgery, pain stimulation, mental and psychological pressure, fatigue, hunger, infection, and inappropriate drug withdrawal can all induce hyperthyroid crisis, endangering the lives of pregnant women and requiring early prevention and treatment. Women with hyperthyroidism often show menstrual disorders, reduction or amenorrhea, and low fertility. Pregnancy complicated by hyperthyroidism is not common clinically, and the domestic incidence rate is reported to be one in a thousand. Most cases of hyperthyroidism during pregnancy are Graves' disease, which is mainly caused by autoimmunity and mental stimulation, and is characterized by diffuse goiter and exophthalmos.