Five-month-old babies with a flat head can try to recover if the fontanel has not closed; if it has, most of the baby’s cranial sutures have already closed, so the possibility of recovery is minimal. If the fontanel has not closed, attempts can be made to correct the sleep position and recovery is possible. An infant’s fontanel usually begins to ossify and become smaller around six months, so for most babies, it is possible for a five-month-old baby with a flat head to recover, but the specifics still depend on the baby’s condition. Five-year-old babies with a flat head can usually correct sleep and so on, try to improve the head shape, generally babies with age are also slightly improved.