Separation anxiety is a normal developmental stage where children experience anxiety when apart from their primary caregiver, typically occurring from 8 to 14 months and usually resolving by age 2. Children may demonstrate excessive distress, nightmares, and reluctance to separate from their caregivers, particularly in unfamiliar or stressful environments. While no treatment is generally necessary for typical separation anxiety, supportive strategies from parents and caregivers can help alleviate distress and foster independence.