How to Know if Your Baby Is Overtired When babies are overtired, their body releases stress hormones (cortisol adrenaline), which makes it even harder for them to sleep. 👶 Signs Your Baby Is Overtired • Hard crying and can’t be soothed • Fussy, irritable, clingy • Rubbing eyes, pulling ears, yawning nonstop • Arching back or turning head away • Hyperactive or looks “wired” • Wakes up often after finally falling asleep • Short naps (20–30 minutes only) • Takes longer to fall asleep • Suddenly cr