Heel blood results usually come out in 2-4 weeks. Heel blood is usually sent to the municipal CDC, for centralized examination, the results will be informed by text message or phone call, or you can check on the relevant online, it usually takes 2-4 weeks to get the results. Heel blood needs to be collected about 72 hours after the birth of a small child, mainly for targeted checking of some inborn genetic metabolic diseases of babies, which are now commonly carried out in China, such as congenital hypothyroidism, as well as phenylketonuria, glucose-6-phosphate dehydrogenase deficiency, and so on. Parents must cooperate with the national policy, actively do a good job of screening, if the results are abnormal, you need to follow the instructions as soon as possible to the relevant hospitals for review, do not delay, so as not to miss the best diagnosis and treatment time.