Heel blood abnormalities can be reviewed again, and if the abnormality still exists, the appropriate treatment should be chosen according to the specific cause. Heel blood screening is mainly used to detect some hereditary diseases and endocrine diseases, such as phenylketonuria and hypothyroidism. If abnormalities are present, the test should be repeated. If the results are normal, there is no need to worry. If the results are normal, there is no need to worry too much. If the results are still abnormal, further tests are needed to clarify which disease it is. If it is clear that it is phenylketonuria, a low-phenylalanine diet should be adopted, and tyrosine should be supplemented under the guidance of the doctor. If the above diseases are not treated in time, it will affect the baby’s intellectual development and growth, and heel blood screening should be emphasized. All medications should be used under the guidance of a doctor, avoid self-medication.