Babies can be held vertically for three months, but do not keep this position for a long time. Infants in three months when the neck muscles have been slowly developed, at this time most of the infants can raise their own head, so parents can hold the baby vertical, especially after eating milk, parents need to hold the baby for burping, to help alleviate spitting up, hiccups, but burping time should not be too long, as far as possible not more than half an hour. Parents need to pay attention to the posture when the baby is held vertically, try to use one hand to support the baby’s buttocks, the other hand to support the baby’s head, to avoid the baby’s head on both sides of the swaying back and forth.