If the initial screening of infantile hypothyroidism is positive, hypothyroidism may be present, and a complete set of thyroid function tests is needed to confirm whether the disease is present, and if it is present, it is usually treated with medication. Infants with positive initial screening for hypothyroidism need to be retested for a complete set of thyroid function tests, and if it is clear that they have hypothyroidism, they can be treated with levothyroxine sodium replacement therapy under the guidance of a doctor, which will help restore thyroid function to normal. If any uncomfortable symptoms occur in the course of use, the infant should immediately seek medical treatment. In addition, it is necessary to strictly follow the doctor’s instructions to regularly review the thyroid function, depending on the specific situation to see whether it is necessary to adjust the dose of the drug, if the results of the examination of the infant’s thyroid function shows that it is good or has returned to normal, you can follow the doctor’s instructions to gradually reduce the amount of drugs or even stop the drug. Parents are advised to bring their infants for active examination and treatment, and take correct treatment measures under the guidance of the doctor after diagnosis, so as to avoid delaying the treatment and aggravating the condition.