Nowadays, children are the center of the family, and a child is often born with 4 to 5 adults around, and when they hear crying, they rush to pick them up and pat them, shake them, as if they have suffered a lot of grievances by crying a few times. In fact, the baby crying is part of his (her) life, crying not only exercises the vocal cords, practice vocalization, but also in crying accompanied by the movement of small arms and legs, which is conducive to physical development, especially to increase lung capacity, so that lung function is improved, which can improve respiratory resistance, reduce colds and other illnesses. Another point is that crying is good for the nasolacrimal ducts to open up, for some due to the lower end of the nasolacrimal ducts after birth obstruction caused by the tear overflow effect. In addition, the infant can not suffer a little bit of aggression, after understanding will be more capricious, bring trouble to education. Of course, parents should be able to grasp the extent of the baby’s crying, if it is unusually intense crying or sudden bouts of crying to find the cause. When parents know that their baby is hungry and needs to be fed or changed, there is no harm in letting the baby cry a few times before preparing to feed or change the diaper.