Final answer:
The nurse should assess the newborn's cephalohematoma, monitor it for any signs of infection or worsening, and educate the parents about the condition and its expected course.
Step-by-step explanation:
If a newborn has cephalohematoma, the nurse should assess the condition and communicate with the parents regarding their concerns. Cephalohematoma is a condition characterized by bleeding beneath the periosteum, which is a membrane that covers the cranial bones. It usually occurs due to birth trauma during delivery, and it may take a few weeks to resolve on its own without treatment. The nurse should monitor the cephalohematoma for any signs of infection or worsening and educate the parents about the condition and its expected course.