When to Call the Pediatrician for Projectile Vomiting vs Normal Spit Up

Almost all babies spit up. But there is a meaningful difference between normal spit-up, gastro-oesophageal reflux, and projectile vomiting — and knowing the difference can help you catch a rare but serious condition early.

Normal Spit-Up

Normal spit-up is the gentle dribbling or small vomit that occurs during or after feeds. It happens because the lower oesophageal sphincter (the valve between the oesophagus and stomach) is immature and does not stay closed. It looks like curdled milk, is often effortless, and the baby shows no distress. It is commonly called 'happy spitter.'

Gastro-Oesophageal Reflux (GOR)

GOR is normal in infants and is the same mechanism as normal spit-up but more frequent or more forceful. It becomes gastro-oesophageal reflux disease (GORD) when it causes complications: poor weight gain, irritability during feeds, arching of the back, sleep disturbance, or respiratory symptoms.

Projectile Vomiting

Projectile vomiting means the vomit travels with force — shooting outward, often reaching a metre or more. It occurs because the pylorus (the muscle at the outlet of the stomach) is abnormally thickened, preventing food from passing to the small intestine. This is called pyloric stenosis.

Pyloric Stenosis

Pyloric stenosis typically presents at 2–6 weeks of age (usually in first-born males, though it affects any baby) with escalating projectile vomiting after every feed. The baby is hungry and feeds well immediately after vomiting but cannot retain anything. The classic sign is an olive-shaped mass palpable in the right upper abdomen. Diagnosis is by ultrasound; treatment is surgical (pyloromyotomy).