Newborn babies often after sleep, local muscles will have twitching phenomenon, especially fingers or toes will be gently twitching, in the light stimulation, such as strong light, sound or vibration, the baby will appear hands upward open, and soon retracted, sometimes accompanied by cries of jumping response. This time is due to the immaturity of the neonatal nervous system, at this time, as long as the mother gently press any part of the baby’s body with her hand, you can make him quiet. If your baby has frequent startles, or even sweating, sleep disturbances, etc., you need to consider a vitamin D deficiency, and can give your baby appropriate cod liver oil supplements.