Hypothyroidism refers to patients with insufficient thyroid hormone synthesis and secretion, and the main manifestation of patients is hypothyroidism. Hypothyroidism is a common metabolic disease, which is divided into primary hypothyroidism and secondary hypothyroidism, and there are the following situations: 1. Primary hypothyroidism is the most common among hypothyroidism patients, which is caused by the patients’ taking of thyroid medication, and there are also hypothyroidism caused by a variety of thyroid disorders, such as surgical resection of the thyroid, radioactive iodine treatment, congenital thyroid deficiency, etc., all of which can cause hypothyroidism; 2. Congenital thyroid deficiency, etc., can cause patients with hypothyroidism; 2, patients living in iodine-deficient areas, due to long-term iodine deficiency in the body is also prone to cause hypothyroidism; 3, due to maternal prenatal thyroid medication, or maternal immune diseases, resulting in newborns born hypothyroidism; 4, due to genetic factors, so that patients with thyroid hormone synthesis blocked triggered by hypothyroidism.