Spit-up or vomit?

Medically-informed · Sources: MedlinePlus · Updated June 2026 · 3 min read

The distinction that matters

Spit-up dribbles or rolls out effortlessly, often with a burp, and the baby barely notices. Vomiting is forceful, distressing and usually repeated. The first is laundry; the second is information.

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Why spit-up is everywhere

The valve at the top of a newborn stomach is lazy for months. Commonly seen: spitting after many feeds, with volume that looks bigger on your shirt than it really was. Happy, gaining babies who spit are called 'happy spitters' in clinics for a reason.

Is this normal for your baby?

FirstWeeks answers with your baby’s age and today’s log in mind — with pediatric sources attached.

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Tilt the odds

Upright 15–20 minutes after feeds, unhurried burping, avoid bouncing right after eating, and check the bottle nipple flow if bottle-feeding. None of it eliminates spit-up; all of it reduces it.

Call the same day

Forceful projectile vomiting after multiple feeds in a row, green or yellow-stained vomit, blood, a baby who seems in pain, or fewer wet diapers — pediatrician now, these are different stories from spit-up.

The timeline

Spit-up commonly peaks around 2–4 months and fades as sitting and solids arrive. The washing machine sees the worst of it, not the baby.