The prevalence of thyroid disorders is more than 5%, especially among young adults and women of childbearing age. Thyroid disease is a serious metabolic disease that often affects the whole body, and if left unattended and unattended, it can bring about a terrible or even fatal “butterfly” effect on the body. 1. What is the thyroid gland? The thyroid gland is the largest endocrine gland in the body, located in the neck, on both sides of the trachea, in the shape of a butterfly. It synthesizes and secretes thyroid hormones, which are transported to various tissues throughout the body along with blood circulation to regulate energy metabolism, maintain body temperature, and ensure that the brain, heart, muscles and other organs do their jobs. Therefore, the thyroid gland is imaginatively compared to the body’s “engine”. 2. What are the dangers of thyroid disorders? Thyroid disorders can be divided into two categories: thyroid disorders and thyroid nodules (including benign and malignant nodules). However, they are not independent diseases, but often interact with each other and appear simultaneously. For patients with simple benign nodules, no special treatment is usually needed, only regular follow-up; while when patients with nodules and disorders of thyroid function occur, they can affect all systems of the body and must be treated early. ①Metabolism: abnormal thyroid function has a significant impact on glucose metabolism, fat metabolism, protein metabolism, vitamin metabolism, and water and salt metabolism, manifested as hyperthyroidism such as fear of heat, emaciation and strong appetite, or hypothyroidism such as fear of cold, loss of appetite, etc.; ②Growth and development: lack of thyroid hormone in childhood is likely to cause developmental delay and decreased intelligence, leading to cretinism; ③Cardiovascular system: patients may develop tachycardia, arrhythmia, and in severe cases, arrhythmia. (4) Digestive system: constipation/diarrhea, liver dysfunction, etc.; (5) Reproductive system: menstrual disorders and infertility in women; impotence, premature ejaculation and even sterility in men; (6) Urinary system: electrolyte excretion disorders, edema, etc.; (7) Nervous system: mental hyperactivity, chattering, or mental depression, etc.; (8) Hematological system: anemia, etc.