In addition to the baby’s sympathetic nerve dominance, it may also be due to the baby’s own high metabolism, body tissues need more blood supply, it is easy to wake up, not necessarily that the baby’s body is abnormal, sometimes also belong to normal, no other uncomfortable symptoms, for the time being, no special treatment is needed. Because of the baby’s growth and development speed, the growth rate of bones and vitamin D, calcium needs are directly proportional to the baby’s growth rate, the need for vitamin D is large, while the baby’s diet generally contains very little vitamin D, these factors can cause the baby to wake up easily at night, you can properly give the baby more vitamin D and calcium supplements, more sunshine for the baby, which is conducive to the absorption of vitamin D, can gradually Improve gradually.