Newborns sleep less, mainly considered caused by the following reasons: 1, due to the unique physique of newborns, because some newborns appear to sleep less, due to their own unique temperament. The newborn’s physique belongs to this type, the spirit is more vigorous, thus sleeping less. Newborns are in a better state of mind, eating milk is normal, development is also normal range, parents are not need to worry too much; 2, due to the lack of milk consumption, some newborns sleep less, often wake up after a short sleep, which is often due to the lack of milk consumption, not enough fullness, often waking up because of hunger, to increase the amount of milk feeding in a timely manner; 3, due to the lack of trace elements caused by the common lack of trace elements, such as calcium deficiency, can cause less sleep. For example, calcium deficiency can cause less sleep, and lead to more sweating, chicken chest, rib beads and other calcium deficiency performance. Vitamin D and calcium can be supplemented in time for preventive treatment.