The symptoms of poor thyroid function in pregnant women can be divided into hyperthyroidism and hypothyroidism. Hyperthyroidism is characterized by hyper-metabolic symptoms, such as fear of heat, excessive sweating, flushed skin, rapid pulse, and easy agitation, etc. In severe cases, hyperthyroid crisis may occur, manifesting as irritability, profuse sweating, deficiency, shock, coma, high fever, and abnormal heart function. . The abnormal thyroid function during pregnancy should be treated with timely medication according to the clinical manifestations and thyroid function, so as not to affect the development of the fetus, which can lead to premature birth, miscarriage, fetal malformation, and also affect the fetal intellectual development.