Why a baby cries when you put them down after being carried? Babies cry when you put them down because your arms act like a complete calming system. While being carried, their heartbeat, breathing, temperature, and stress hormones all stay regulated by your warmth, scent, and movement. The moment you put them down, all those signals disappear at once — their body feels the change, and their brain (which is still immature) sends an alarm through crying. It’s not “spoiled”… it’s biology. They simp