Baby Vomiting After Every Feed: When It's Reflux, Allergy, or Infection—Home Checklist & When to Call the Doctor

Posseting vs Vomiting: What's Actually Coming Out

Posseting: the gentle flow of undigested milk from the mouth, often mixed with saliva, minutes after a feed. Baby seems fine, continues playing, no distress. This happens in about 67% of healthy Indian infants under 3 months and resolves by 12–18 months without treatment, according to paediatrician consensus in IAP guidelines.

Projectile vomiting: milk forcefully expelled across the room, baby appears uncomfortable or hungry soon after, or repeated episodes throughout the day. This is a sign something is wrong.

The key question: Is your baby gaining weight, wetting 6+ nappies daily, and otherwise playful? Posseting alone won't hurt him. If he's losing weight, soaking fewer nappies, or vomiting forcefully every single feed, we need to dig deeper.

Three Main Reasons Your Baby Vomits After Every Feed

1. Gastro-Oesophageal Reflux Disease (GERD)
The muscle between the oesophagus and stomach is still immature—milk and stomach acid come back up. Most common in premature babies and those fed too quickly or in large volumes. Baby may arch his back, cry during feeds, have hiccups or wet coughs. GERD alone doesn't cause fever or green vomit. If your baby is healthy otherwise and just spits up, it's likely reflux. Many paediatricians recommend smaller, more frequent feeds, keeping baby upright for 20 minutes after eating, and checking feeding technique before prescribing medication.

2. Cow's Milk Protein Allergy (CMPA)
If you're using formula, the protein triggers inflammation in the stomach lining. Vomiting is paired with loose or mucus-y stools, sometimes blood-streaked poo, skin rashes, or extreme fussiness after feeds. This is rare in exclusively breastfed babies (unless mum consumes cow's milk heavily), but common in formula-fed infants. Switching to hydrolysed formula (like Similac Alimentum or Aptamil Pepti) often stops vomiting within 48 hours. These are available on Amazon.in and FirstCry at Rs 1,200–1,800 per tin.

3. Viral or Bacterial Gastroenteritis
Vomiting is paired with diarrhoea, fever, lethargy, or exposure to an ill family member. This is infectious and urgent—dehydration can happen fast in infants under 6 months. If vomit is green (bile-stained), coffee-coloured (blood-tinged), or baby has a fever above 38.5°C, call your paediatrician immediately or visit the nearest clinic.

Red Flags: When to Rush to the Hospital

Do not wait for a routine appointment if you see any of these:

• Green, yellow, or blood-tinged vomit—suggests bile or internal bleeding.
• Fever above 38.5°C paired with vomiting and lethargy.
• Baby seems limp, unusually drowsy, or unresponsive—sign of severe dehydration or sepsis.
• Fewer than 3 wet nappies in 24 hours, dry lips, or sunken fontanelle—dehydration is developing.
• Projectile vomiting at every feed, baby hungry immediately after, and abdominal distension—pyloric stenosis (rare, needs ultrasound and surgery).
• Baby refuses feeds or cries in pain during feeds for more than one day.

If any of these apply, go to your nearest paediatric emergency room. Don't assume it will resolve on its own.

Home Observation Checklist: Is It Safe to Wait?

If your baby has no red flags, use this checklist over 48 hours:

• Count wet nappies (must be 6+). Count poos (note colour and texture).
• Check weight—does baby feel lighter or is the belly distended?
• Observe feeding: is baby latching properly? Are you burping mid-feed? Is the bottle teat hole too large?
• Record temperature (normal is 36.5–37.5°C in axilla).
• Note mood: is baby playful or irritable?
• After each episode, offer sips of boiled water or ORS. Do not skip the next feed if baby wants it.

If wet nappies drop, baby becomes lethargic, or vomiting increases after 48 hours—call your paediatrician same day. Do not wait until evening or Monday morning if it's a weekend.

ORS Preparation for Indian Homes

Dehydration is the real danger with vomiting, not the spitting itself. You don't need packaged ORS sachets—the WHO formula works at home.

Homemade ORS (for infants 6+ months or on doctor's advice for younger babies):
Boil and cool 1 litre of water. Add 6 level teaspoons of sugar and 1/2 teaspoon of salt. Stir until dissolved. No sugar syrup, no honey (never for under-1 babies), no lime juice initially. Give small sips (5–10 ml) every 2–3 minutes using a spoon or syringe, not a bottle.

For babies under 6 months, consult your paediatrician before giving ORS; breast milk or formula may be safer. If baby is refusing even sips, that's a sign to go to hospital—IV fluids may be needed.

Sachets like Electral Junior (Rs 40–60 per sachet on Amazon.in) are convenient and dissolve easily in boiled water. Keep 4–5 at home always.

What Paediatricians Say

Common Questions Parents Ask

Should I feed my baby again if she vomits after feeding?
Wait 20–30 minutes. Offer breast or bottle again; most babies want to feed. If she vomits again immediately, call your doctor. Repeated refusal suggests pain or nausea.

Can I prevent vomiting by changing formula?
Not without knowing the cause. If it's reflux, changing formula won't help. If it's CMPA, switching to hydrolysed formula works fast. Ask your paediatrician to rule out allergy first (skin prick test or elimination diet) before trying expensive specialized formulas.

Is it safe to use anti-reflux medication at home?
No. Ranitidine, omeprazole, or domperidone are prescription-only for infants. These are used in under-3-month babies only under strict medical supervision. Self-medicating risks masking serious conditions like allergies or infection.