Why Babies Vomit After Feeding Babies vomiting after feeding is very common, and in most cases, it’s not a sign of sickness. Their stomachs are still small and sensitive, so even a little extra milk can easily come back up. Here are the most common reasons: 1️⃣ Overfeeding When a baby takes more milk than their tiny stomach can hold, the excess will come back up—especially in newborns. 2️⃣ Swallowing Too Much Air If a baby feeds too fast or cries before feeding, they swallow air. That trapped ai