Baby Not Responding to Facial Expressions
The short answer
Responding to facial expressions is an important social communication milestone. By 2-3 months, most babies smile back when smiled at. By 6-9 months, they start reading emotions and responding differently to happy, sad, or angry faces. By 12 months, babies use "social referencing" - looking at a parent's face to gauge whether something is safe. Not responding to facial expressions can be a normal variation, especially in younger babies, but persistent lack of social engagement warrants discussion with your pediatrician.
By Age
What to expect by age
Very young babies are still developing the ability to focus on faces. They may stare at your face during feeding but not yet smile back or mirror your expressions. The social smile typically emerges between 6-12 weeks. Not smiling back before 6 weeks is completely normal.
By 2-3 months, most babies smile in response to your smile. By 4-6 months, they may laugh, coo, and show different facial expressions in response to your tone and expression. If your baby consistently does not respond to your face or seems to look through you rather than at you by 4 months, mention this to your pediatrician.
By this age, babies should be reading facial expressions and responding to them - looking concerned when you look upset, laughing when you make a funny face, and checking your reaction when something new happens (social referencing). Limited response to facial cues at this age, especially combined with other social communication differences, may be evaluated as part of autism screening.
What Should You Do?
When to take action
- Not smiling back before 6-8 weeks of age
- Occasional moments of not engaging with faces when tired, overstimulated, or distracted
- Looking away from faces intermittently to self-regulate (this is healthy)
- Responding more to some caregivers than others
- Your baby does not smile back at you by 3 months
- Your baby does not seem interested in faces by 4-6 months
- Your baby does not show different reactions to happy vs. upset expressions by 9-12 months
- Your baby does not look at your face for reassurance in new situations by 12 months
- Your baby has lost the ability to respond to faces after previously engaging socially (regression)
- Your baby shows no social engagement at all - no eye contact, no smiling, no response to voices or faces
- Lack of facial expression response is accompanied by other developmental concerns like loss of babbling or motor skills
Sources
Related Resources
Related Speech Concerns
Baby Not Smiling
Most babies begin smiling reflexively in the first few weeks and develop a true, intentional smile between 6-12 weeks of age. The timeline varies from baby to baby, and premature babies may smile later based on their adjusted age. If your baby is not smiling at all by 3 months, it is worth mentioning to your pediatrician, but many babies simply take a little longer.
Not Making Eye Contact
Eye contact develops gradually over the first few months of life, and newborns can only focus on objects about 8-12 inches away. Most babies are making consistent eye contact and tracking faces by 2-3 months, so very young babies who seem to look past you are usually developing normally.
Baby Not Smiling Back (No Social Smile)
A social smile - smiling specifically in response to seeing a face, hearing a voice, or during interaction - is one of the earliest and most meaningful social milestones. It typically develops between 6-12 weeks of age. While a general smile might happen randomly, a social smile is directed at people and shows your baby is connecting with you. If your baby is not showing social smiles by 3 months, it is worth discussing with your pediatrician.
Early Signs of Autism in Babies and Toddlers
Autism spectrum disorder (ASD) can sometimes be identified as early as 12-18 months, though most children are not diagnosed until age 2-3. Early signs include limited eye contact, not responding to their name, lack of pointing or showing, limited social smiling, and absence of pretend play. Having one or two of these signs does not mean your child has autism - many typically developing children share individual traits. However, a pattern of multiple social communication differences warrants evaluation. Early intervention, regardless of eventual diagnosis, consistently leads to the best outcomes.
Accent vs Speech Disorder in Bilingual Toddlers
When toddlers grow up hearing more than one language, they naturally blend sounds, patterns, and accents from both languages. This is normal and healthy, not a speech disorder. A bilingual child may pronounce some sounds differently than monolingual peers because they are learning the sound systems of two languages simultaneously. True speech disorders affect both languages equally, while accent influence appears only in specific sounds borrowed from one language to another.
My Baby Is Losing Words or Skills
If your child was consistently using words and has truly stopped, this is something to act on promptly. Regression - the genuine loss of skills a child previously had - is different from a normal plateau or a toddler being too busy to talk, and it always warrants a conversation with your pediatrician sooner rather than later.