Generally speaking, in addition to milk and urine and stool time, most of the time spent in sleep, newborn babies can sleep up to 18-20 hours a day, but there are some newborns sleep is not very solid, and even cry. There are several reasons for this: 1, the room is too cold or too hot will cause the child uncomfortable; the surrounding environment is not quiet, too noisy; clothes or wrapped too tight, wet diapers, etc. will also make the child sleep unsteadily. 2, fed too much before bedtime will cause indigestion or even bloating, resulting in sleep disturbance; baby hungry, will also sleep restlessly, pay attention to feeding on demand, but also do not feed too much. 3, pay attention to check whether there are irritants on the child’s clothes or quilt, or mosquito bites and other factors. 4.Vitamin D and calcium deficiency:If the child is accompanied by excessive sweating, occipital baldness and other symptoms of performance, it means that the child is vitamin D and calcium deficiency caused by sleep disturbance, timely calcium and vitamin D supplementation to the baby, but also to let the baby more sunshine. 5, observe whether the child has other discomfort, such as high body temperature, bloating, nasal congestion, etc.. If the newborn baby is sleep disturbance caused by the above-mentioned reasons, parents can eliminate the causes by careful observation and create a comfortable and quiet sleep environment for the baby, and the baby can sleep peacefully.