They don't throw up, it's actually a kind of reflux. Babies need a lot of food, but their digestigve system can't always handle it yet and some of it flows back into the mouth..
For babies sometimes the flap above the esophagus isn't fully developed and stomache acid comes up, known as GERD. It's like really bad heartburn for babies.
[–] Lumidaub ago
They don't throw up, it's actually a kind of reflux. Babies need a lot of food, but their digestigve system can't always handle it yet and some of it flows back into the mouth..