The redness of the face of a newborn when crying is a physiological manifestation, because the facial skin of a newborn is thin and the blood vessels are superficially located, so when the child cries the facial blood vessels expand and become engorged with blood, presenting the face as red. Not only when the child is crying, but also when the child stretches hard, there will be facial redness, which is also a physiological phenomenon, so parents do not need to worry about it. However, if the child’s face is blue-purple when crying, it is a pathological phenomenon, and the most common cause is congenital heart disease, so if the child has the above performance, parents are advised to take the child to the hospital in time for cardiac auscultation and, if necessary, improve the cardiac ultrasound to assist in the diagnosis.