Newborn brain development is obviously different from older children and adults, the newborn brain is not particularly mature stage of development, especially sleep can not be as adults sleep very real, very deep, easily affected by the outside world, slightly outside some sound, some bright light will wake up, at this time will find its a moment to twist, make a variety of sounds, although not fully awake, but sleep is not real, this is This is a normal phenomenon that often occurs in newborns. Some newborns really do not sleep well, often wake up, wake up and cry, eat milk or do not eat milk to hold a good, but not a short time again, this situation should look for the cause. Some children have intestinal flatulence, colic situation, some children because of vitamin D deficiency, early rickets performance or increased excitability, so parents need to promptly identify. If the newborn cries, but does not eat milk, the stomach is very bulging, but also constantly exhaust and very smelly, the stool is not digested, etc., may still be gastrointestinal problems. If the child does not get much sunlight and does not take vitamin A and vitamin D, and does not sleep particularly well in the middle of the night, it is likely to be an early manifestation of rickets and needs to be evaluated by a pediatrician at a pediatric clinic for symptomatic treatment.