This document discusses the stressors and reactions that hospitalized children of different ages may experience. It outlines John Bowlby's three stages of separation anxiety for infants and toddlers: protest, despair, and detachment. Symptoms of separation anxiety are described for infants, toddlers, preschoolers, scholars, and adolescents. The document also addresses parental and sibling anxiety when a child is hospitalized, as well as the role of nurses in supporting hospitalized children and their families.