Baby Tongue Thrust Reflex
The short answer
The tongue thrust reflex, also called the extrusion reflex, is a normal protective reflex that causes babies to push objects out of their mouth with their tongue. This reflex is present from birth and is designed to prevent choking. It typically fades between 4 and 6 months of age, which is one of the key signs of readiness for solid foods. If your baby is pushing food out, they may simply not be ready for solids yet.
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By Age
What to expect by age
0-4 months
The tongue thrust reflex is fully active and very strong at this age. This is one of the reasons experts recommend waiting until at least 4 months (and ideally around 6 months) to start solid foods. If food is placed on a young baby's tongue, the reflex will push it right back out. This is completely normal and protective, not a sign that anything is wrong.
4-6 months
The tongue thrust reflex gradually diminishes during this window as your baby's oral motor skills develop. Your baby's tongue begins to learn to move food from the front to the back of the mouth for swallowing. Testing readiness for solids by offering a small amount of thin puree on a spoon can tell you if the reflex has faded enough. If food comes right back out every time, wait a week or two and try again.
6-8 months
Most babies have lost the tongue thrust reflex by 6 months, allowing them to manage purees and soft foods. If your baby is still strongly pushing all food out at 7 or 8 months, it may indicate that their oral motor development is a bit behind. Continue offering tastes and textures. If the reflex persists beyond 8 months, mention it to your pediatrician, as it may warrant a feeding evaluation.
8 months+
A persistent tongue thrust reflex beyond 8 months is uncommon and may indicate oral motor difficulties or a neurological consideration. It does not necessarily mean something serious, but a speech-language pathologist or occupational therapist who specializes in feeding can assess your baby and offer exercises and strategies to help with tongue control and food management.
What Should You Do?
When to take action
- Your baby under 6 months pushes food out when you try to introduce solids
- Your baby is gradually improving at keeping food in their mouth over several weeks of practice
- Your baby pushes out new or unfamiliar textures but manages familiar purees
- Your baby shows other signs of readiness like sitting and interest in food even though they still push some food out
- Your baby is over 7 months and still pushing out all food with their tongue despite regular practice
- Your baby has difficulty coordinating sucking, swallowing, and breathing during liquid feeds
- Your baby seems to have limited tongue movement overall, including during babbling
- Your baby has difficulty swallowing liquids and shows signs of aspiration such as coughing, choking, or wet-sounding breathing during feeds
- Your baby has a persistent tongue thrust combined with difficulty gaining weight and other developmental concerns
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
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Related Feeding Concerns
When to Introduce Allergens to Baby
Current guidelines recommend introducing common allergens (peanut, egg, cow's milk products, tree nuts, wheat, soy, fish, shellfish, sesame) starting around 4-6 months when your baby is developmentally ready for solids. The landmark LEAP study showed that early introduction of peanuts (by 4-6 months) reduced peanut allergy risk by 80% in high-risk infants. Do not delay allergens - the old advice to wait until 1-3 years has been reversed because early exposure actually prevents allergies.
I'm Worried My Baby Is Aspirating During Feeds
Aspiration means liquid or food enters the airway instead of the stomach. Occasional coughing during feeds is common and does not usually indicate aspiration. True aspiration is less common and may present as recurrent respiratory infections, a wet or gurgly voice after feeds, or chronic cough. If you are concerned, a swallow study can provide a definitive answer.
Could My Baby Be Aspirating During Feeding?
Aspiration occurs when food or liquid enters the airway instead of the esophagus. Signs include coughing or choking during every feed, a wet or gurgly voice after eating, recurrent chest infections, and breathing changes during meals. Silent aspiration can occur without obvious coughing. If you suspect aspiration, contact your pediatrician as a swallowing study can diagnose it.
Baby Biting Nipple While Nursing
Biting during breastfeeding is a common challenge, especially when babies start teething. It can be startling and painful, but it is almost always a phase that can be managed. Babies cannot actively nurse and bite at the same time because their tongue covers the lower teeth during proper sucking. Biting typically happens at the beginning or end of a feed when the latch is not active. With some gentle strategies, most babies learn quickly that biting ends the feeding session.
My Baby Keeps Clamping Down on the Spoon
Clamping down on the spoon is very common, especially during teething or when babies are learning new oral motor skills. It is often a sensory exploration behavior rather than a feeding problem. Using a soft silicone spoon and placing food on the front of the spoon can help.
How Can My Baby Get Enough Calcium Without Dairy?
If your baby cannot have dairy due to allergy or intolerance, there are many other calcium sources. These include calcium-fortified foods, broccoli, kale, tofu made with calcium sulfate, beans, calcium-fortified plant milks (after 12 months), and sardines. Breast milk and formula provide adequate calcium before 12 months. If dairy-free after 12 months, planning is important.