Congenital hypothyroidism is not usually life-threatening. Thyroid function plays an important role in the functioning of the human body. If the thyroid function does not continue to function, the child will have problems with intelligence or physical development and needs to be detected and treated in a timely manner. Early detection and regular treatment is no different from normal children, but the disease is not completely cured after a period of treatment; it requires long-term treatment and requires the child to take thyroxine tablets for a long time, and some children will take this medication for life. Treatment begins as soon as the child is diagnosed, usually in the first month of life, and some hypothyroidism is treated permanently, mostly at 2-3 years of age. The earlier the neonatal hypothyroidism is treated, the better the prognosis will be, it will not affect the growth and intellectual development of the child, and the neurological symptoms can be reversed with timely scientific treatment. It is medically accepted that the disease detected within 2 months and then treated early, while taking medication for life, is basically normal intellectually. If babies older than 10 months are only discovered and treated, intelligence can only reach about 80% of normal, and if discovered older than 2 years, this intellectual backwardness is irreversible if it affects intelligence.