Can Teething Cause Vomiting? No — and How to Tell Gagging From True Vomiting

Key Takeaways

• No. Teething does not cause vomiting. The largest prospective study found no link between tooth eruption and vomiting ¹.
• What looks like “teething vomit” is usually gagging on fingers and toys, spit-up, or a stomach bug arriving at the same time as a tooth ²³.
• Treat vomiting as its own illness: offer small, frequent fluids and watch wet diapers for dehydration ⁴.
• Call promptly for green or bloody vomit, forceful repeated vomiting, signs of dehydration, or vomiting with fever ⁴⁵. Our teething vs. ear infection vs. cold guide shows how the fever line separates teething from illness.

The short answer: no

Vomiting is not a teething symptom. The AAP symptom checker lists vomiting among the things teething does not cause ². In the largest prospective study of teething — 125 infants followed daily through 475 tooth eruptions — vomiting showed no association with tooth emergence ¹. Reviews of teething signs reach the same conclusion: drooling, chewing, cranky spells, and a slight temperature rise can come with teeth, but true vomiting does not ³⁶⁷.

If your baby is truly vomiting, something else is going on — even if a tooth is also coming in. The sections below help you tell gagging from vomiting and decide what to do next.

Why the confusion: gagging looks like vomiting

Teething babies shove everything into their mouths — fingers, fists, toys, teethers. That extra chewing triggers the gag reflex, and a gagged feed comes back up. Parents understandably call it vomiting. It is not. True vomiting is forceful, involves retching and stomach contractions, and brings up a larger volume. Gagging is brief, triggered by something in the mouth, and the baby recovers fast.

	Gagging on fingers or toys	True vomiting
Trigger	Something touched the back of the tongue or throat	Often none — starts on its own, sometimes after a feed 3
Effort	Quick gag or cough, then over	Retching and heaving with stomach muscles working 3
Volume	Small — a mouthful of milk or drool	Larger — much or all of the feed comes up 3
Baby after	Settles quickly, happy, wants to play	Upset or limp, may refuse the next feed 3
Pattern	Happens while chewing on hands or toys	Repeats, sometimes with diarrhea, fever, or poor feeding 25

If episodes only happen while your baby is gnawing on something and she bounces right back, that is gagging — offer a firm chilled teether instead of fingers and it usually stops. For the full spit-up versus vomit breakdown by effort, volume, color, and weight trend, see our spit-up vs. vomit guide.

What actually causes vomiting at teething age

Three usual suspects explain almost all vomiting in babies cutting teeth:

A stomach bug. Viral gastroenteritis is the most common cause of vomiting with or without diarrhea at this age — see can teething cause diarrhea for the stool side. It spreads fast through daycare and siblings, and it peaks in the same months teeth arrive — so the overlap is coincidence, not cause ⁵.

Overfeeding or fast feeding. A baby who drinks too much or too fast can throw up part of the feed. This is effortful vomiting rather than easy spit-up, but it stops when the feed size or pace is adjusted — unlike illness, it does not come with fever or diarrhea ³.

Reflux (GER). Milk washing back up from an immature stomach valve causes effortless spit-up in about half of young babies, and occasionally larger vomits. Reflux spit-up is small, easy, and the baby stays comfortable and keeps gaining weight — a very different picture from an ill, vomiting baby ³.

What to do at home

Treat vomiting as its own illness, not a tooth symptom:

• Offer small, frequent fluids. Continue breast milk or formula in smaller amounts more often. Do not water down formula or offer juice ⁴.
• Count wet diapers. Fewer than 6 wet diapers a day, no wet diaper for 6–8 hours, a dry mouth, no tears when crying, or an unusually sleepy baby all signal dehydration — call the doctor ⁴.
• Keep feeds gentle. If overfeeding seems likely, slow the pace with burp breaks and check that the bottle nipple flow is not too fast.
• Skip teething fixes. Gels, tablets, and necklaces do not help vomiting and carry real risks — the AAP and FDA warn against benzocaine gels, homeopathic tablets, and amber necklaces ⁶.
• Watch, don’t mask. Take the temperature before giving any fever medicine. A true fever of 100.4°F (38°C) or higher with vomiting points to infection and needs a call ⁵.

When to call the doctor: the red lines

Call promptly — none of these is teething:

• Green or yellow-green vomit (bile) or vomit with blood or black material ³.
• Forceful or projectile vomiting, especially in a baby under 2 months old — needs same-day evaluation ³.
• Repeated vomiting that will not stop, or any vomiting with fever of 100.4°F (38°C) or higher ⁵.
• Dehydration signs: fewer than 6 wet diapers a day, no wet diaper for 6–8 hours, dry mouth, no tears, sunken soft spot, unusual sleepiness ⁴.
• A baby who is inconsolable, floppy, unusually drowsy, or looks seriously ill to you — trust your instinct and call ².

Frequently asked questions

Can teething cause fever and vomiting together?

No. Neither symptom comes from teeth. Fever of 100.4°F (38°C) or higher is never teething, and vomiting is never teething — together they point to infection, most often a stomach bug or a cold with an ear infection at this age ¹²⁵. Call your pediatrician rather than waiting for a tooth.

My baby gags on her fingers and throws up milk — is that teething vomit?

Gagging from chewing is common while teething, but it is not true vomiting. If it only happens while something is in her mouth, the volume is small, and she recovers quickly, it is gagging — redirect to a firm chilled teether ⁶⁷. Repeated vomiting that starts on its own needs evaluation as illness ².

Can drooling and swallowing extra saliva cause vomiting?

Swallowed drool does not cause true vomiting. The prospective research found no link between tooth eruption and vomiting even though teething babies drool heavily ¹. Vomiting with heavy drooling is still vomiting from another cause ².

Can teething cause vomiting and diarrhea?

No. Prospective studies found no link between tooth eruption and either vomiting or loose, frequent stools ¹. Vomiting plus diarrhea means a stomach bug until proven otherwise — focus on fluids and watch wet diapers closely ⁴⁵.

When should I stop blaming teething for spit-up or vomit?

Right away for true vomiting — it was never the tooth ¹². For easy, small spit-ups in a comfortable, growing baby, that is normal reflux and fades with age ³. The line is effort plus mood: effortless dribble with a happy baby is reflux; retching with a miserable baby is illness.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Every baby is different. Always consult your pediatrician with questions about your baby’s symptoms, vomiting, fever, or health.

Footnotes

1. Macknin ML, Piedmonte M, Jacobs J, Skibinski C, “Symptoms associated with infant teething: a prospective study,” Pediatrics 2000;105(4):747-752. Source ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

2. American Academy of Pediatrics (HealthyChildren.org), “Teething” (KidsDoc Symptom Checker). Source ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸

3. Mayo Clinic, “Teething: Tips for soothing sore gums.” Source ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹

4. American Academy of Pediatrics (HealthyChildren.org), “Signs of Dehydration in Infants and Children.” Source ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

5. American Academy of Pediatrics (HealthyChildren.org), “Fever and Your Baby.” Source ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷

6. Cleveland Clinic Health Essentials, “Teething Doesn’t Cause Fevers, and Other Myths To Sink Your Teeth Into.” Source ↩ ↩² ↩³

7. Massignan C, Cardoso M, Porporatti AL, et al., “Signs and Symptoms of Primary Tooth Eruption: A Meta-analysis,” Pediatrics 2016;137(3):e20153501. Source ↩ ↩²