1.What is the thyroid gland? The thyroid gland is the largest endocrine gland in the body and is 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 with blood circulation, regulating energy metabolism, maintaining body temperature, and ensuring 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 at the same time. For patients with simple benign nodules, no special treatment is usually needed, only regular follow-up; however, when patients with nodules develop disorders of thyroid function, they can affect all systems and must be treated early. (1) Metabolism: 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. (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, etc. (6) Urinary system: electrolyte excretion disorders, edema, etc. (7) Nervous system: mental hyperactivity, chattering, or mental depression, depression, etc. (8) Hematological system: anemia, etc. (8) Blood system: anemia, etc. 3.What are the high-risk groups prone to thyroid disease? The incidence of thyroid disease has been increasing year by year in recent years. Abnormal thyroid function is closely related to many diseases, such as cardiovascular events, osteoporosis, fertility disorders, digestive disorders, etc. The incidence of thyroid disorders is closely related to lifestyle habits, stress, and dietary factors, and is particularly high in young adults and women of childbearing age.