Newborn heel blood screening, generally refers to the infant’s heel blood collected 72 hours after birth, mainly for some relatively high incidence, early no obvious symptoms, only through the blood test can get positive results, the main two screening diseases are congenital hypothyroidism and phenylketonuria. If your child does not pass the heel blood screening, don’t worry too much, first of all, cooperate with your doctor and retest the heel blood again. Because heel blood screening is affected by a variety of factors, such as prematurity, or the child does not have enough milk, or because of reagents, operation and other problems, these may affect the results and false positives, re-test results if there is no problem, generally can be reassured. If the result is still positive, the child’s thyroid function and the child’s metabolic function should be checked further. If the child does have a problem in this area, there is no need to worry too much, as timely and proper treatment can achieve the desired results. In conclusion, if your child does not pass the heel blood screening test, do not worry too much, you must actively cooperate with the doctor for further review or treatment.