Children from birth to more than two years old waking up crying every night in the early morning, may be a lack of vitamin D or lack of calcium, hunger, nervous sensitivity, etc., can be improved by taking calcium tablets, changing dietary habits, psychological counseling and other methods. 1. Vitamin D deficiency: the lack of vitamin D in the baby’s body will cause non-specific neurological changes, showing symptoms such as easy to cry, irritable, especially at night crying more obvious, supplemental vitamin D and calcium may improve the symptoms. 2. Hunger: It may be due to the parents of the child’s dietary habits are not reasonable, resulting in the child waking up hungry and crying in the early hours of the night, parents are advised to change the meal time. 3. Nerve sensitivity: children to the early morning nerves become very sensitive, easy to wake up crying, it is recommended that mothers and children should try to increase the opportunity to contact each other, good psychological comfort, give the child a sense of security to promote the smooth rest of the night, pay attention to avoid causing the child too large emotional fluctuations. If the child wakes up crying every night in the early hours of the morning when the symptoms continue to not be relieved, there may also be other reasons, then you should go to the hospital in a timely manner, to clarify the cause of the targeted treatment.