Nighttime crying or sudden fear of the dark is a normal developmental milestone as a toddler's imagination grows. To support them, keep nighttime interactions low-key and soothing, avoiding excessive engagement or play. Use a soft, dim nightlight if they seem afraid of total darkness, and stick to a consistent, calm bedtime routine. If your child wakes up upset, offer gentle physical comfort like patting or singing until they settle, reinforcing that they are safe and you are nearby.