What is stranger anxiety?

Written by Yuppo Lab Experts.

Updated 27 October 2026

Stranger anxiety is when a baby becomes wary, clingy or fearful around unfamiliar people. The CDC lists being shy, clingy or fearful around strangers as a milestone by 9 months; it is a normal sign that the baby can tell familiar faces from new ones.

What you can do

  • Hold your baby while they meet new people.
  • Ask visitors to talk from a distance before coming closer.
  • Do not hand your baby over against their will.

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