The baby grows to a certain stage will often tilt his head to look up, because of the young, immature neck development, the head can not be well erect, with the baby’s age, the bones and muscles are gradually developed strong, can raise his head to look at the favorite things. It also proves that the baby’s muscle development has reached a certain stage, curious about the space where they are, want to see, to explore, tilting the head will facilitate the baby to see more, so this is a normal phenomenon. However, there may also be a lack of calcium caused by the phenomenon of the baby always tilting his head, daily life children should be supplemented with vitamin D from the 14th day after birth, until the age of 2 years, if not supplemented on time or the baby grows fast, there may be a low calcium situation, to follow the doctor’s advice to adjust the dose of vitamin D, more sunshine. If the baby always looks upwards, persistent dorsiflexion of the head, high dorsal muscle tone, and the neck and the bed are not in full contact when lying on the back, it is recommended to visit the hospital for examination.