Beneath the soft surface, the skull of a newborn is composed of a set of flexible puzzle-like pieces that allow the baby’s head to grow. These pliable cranial bones are effective in protecting the developing brain, but a long or flat head in newborns may occur if the baby is placed on their back for extended periods. In such cases, parents should not worry excessively about whether a long head in newborns is harmful. If detected early, this condition can improve with proactive adjustments as the child grows.