Your easygoing baby suddenly wails when you leave the room, clings at daycare drop-off, and treats Grandma like a stranger. It feels like a step backward — but separation anxiety is actually a milestone worth quietly celebrating.
Around 6–9 months, babies develop *object permanence*: the understanding that things (and mothers) still exist when out of sight. They now know you've gone — they just can't yet grasp that you always come back. That gap between knowing and trusting is where the tears live. Separation anxiety typically appears around 6–8 months, peaks somewhere between 9 and 18 months, and fades as trust and memory mature. Stranger wariness often arrives on the same schedule — also normal.
Talk to your pediatrician if distress is extreme and unrelenting for weeks, baby can't be comforted by familiar caregivers, or anxiety comes with loss of other skills. Otherwise: this phase is evidence of attachment, not damage — you are their safe base, and that's the point.
*Always consult your pediatrician for advice specific to your baby.*
Daily play plans, CDC milestones, trackers — and CrySense, which reads your own logs when the crying starts.
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