A baby is considered to have passed the danger period only after 72 hours of falling off the bed without any adverse reaction. Baby’s cranium is relatively delicate, and falling from bed may result in cerebral hemorrhage, concussion, craniocerebral fracture, etc. Therefore, if a baby falls from bed, parents should carefully observe whether the child has any abnormal manifestations, such as nausea and vomiting, more than one cry, sleepy and comatose. Generally, craniocerebral injury will show abnormalities within 24 hours. If there are no abnormal manifestations within 24 hours, it is necessary to observe for two more days, and if the baby has no discomfort in 72 hours, it indicates that the danger period has been passed. If the baby falls from the bed, there are crying, nausea and vomiting and other reactions, you should take the baby to the hospital as soon as possible to improve the examination, so as not to cause serious consequences.