A newborn is a small baby from the time the umbilical cord is tied until 28 days after birth. It is normal for most children of this age to cry all the time. Newborns cry as a way of expressing their demands or pain. There are two types of crying in newborns: physiological crying and pathological crying. Newborns will cry if they don’t have enough milk, if they don’t have enough to eat, if they have wet stools and urine, if their clothes are too hot and cold, if they wear clothes that are too tight, if they are in an uncomfortable position, if they are bitten by mosquitoes and insects, so when a child cries, the first thing to look at is whether the baby is hungry, whether there is urine or stool, and whether the clothes are not worn properly. Sometimes it is because the baby needs to be held or coaxed, and the request is not met will also appear crying. Newborns who are suddenly stimulated by loud noises may suddenly cry, accompanied by panic or a change in their complexion. Any disease that causes discomfort or pain can cause crying, such as otitis media, eczema, etc., which can be accompanied by head shaking. If there is an ulcer in the mouth, the child will cry, and if the calcium absorption is affected by not taking vitamin D supplements on time, the child will cry. If the child has colic, he or she may cry. Newborns with inguinal hernia may cry continuously if they have an incarcerated hernia. Children with diaper rash, perianal abscesses, anal fissures, etc. may also cry. Crying may also occur in the presence of central nervous system disorders such as meningitis. There are many causes for crying in newborns, so when a child is crying, it is important to carefully observe the child’s whole body so that you can make a correct judgment.