After birth, babies are too young to express their emotions with words and bodies, so they can only cry to vent their feelings. Therefore, it is very normal for newborns to cry, but if they cry all the time, they should be alerted to certain diseases caused by their bodies. There are two reasons why newborns cry all the time, one is physiological crying and the other is pathological crying. Physiological crying is usually caused by hunger, excessive cold or heat, urinary or fecal stimulation, mosquito bites and other reasons. Other newborns cry habitually, such as needing to be held by adults, before urination, lack of sleep, or even when the lights are out or on. These physiological cries are normal and will stop when the baby’s needs or poor environment are improved, and the intensity and nature of the cries do not change, and there are no other accompanying symptoms such as fever. However, if a newborn baby suddenly cries more than once, it is important to be alert to pathological crying. Especially if it is accompanied by fever and other physical symptoms, you should go to the hospital in time for relevant examinations. Adults should be patient enough to observe the baby’s situation and take good care of it, and pay attention to the abnormal performance of the baby and go to the hospital in time to avoid delays.