Thyroid stimulating hormone 6.38mIU/L in preterm babies does not need special treatment, but it is necessary to combine with other indicators to make a comprehensive judgment, and closely monitor the growth and development. Normally, thyroid function needs to be monitored after birth to avoid cretinism, which affects the baby’s intellectual development. Normal thyroid stimulating hormone level in newborns is less than 10.0mIU/L (there are some differences in the value of positive screening cuts of various reagents), and the current result is 6.38mIU/L, which does not need much intervention for the time being, and can be regularly rechecked for thyroid function. However, if the baby develops symptoms of hypothyroidism, or if there is a high clinical suspicion of hypothyroidism, the complete set of thyroid function and free thyroid hormone level can be rechecked if necessary, and targeted interventions can be carried out according to the guidance of the neonatologist if necessary.