Vitamin D deficiency in newborns often leads to increased neural excitability, resulting in some psychoneurological symptoms. Newborns may have vitamin D deficiency, mostly caused by unbalanced dietary nutrition or calcium deficiency of the mother during pregnancy, which will lead to calcium and phosphorus metabolism disorders in newborns, thus resulting in increased neurological excitability, which usually shows symptoms such as irritability, poor sleep, night terrors, and excessive sweating during sleep. When a newborn is deficient in vitamin D, if it is not supplemented in time, it can lead to further aggravation of the symptoms, and may even lead to some other changes, for example, bone deformity changes. Vitamin D deficiency in newborns, must be supplemented, usually let newborns more sunshine, while can be instructed by the doctor to take vitamin D supplements.