2. Persistent hunger
If babies have pyloric stenosis, they may continuously want to feed. An indication food is not going down into the small intestine might be if your baby is still hungry despite having been fed. If your baby has some illness like a stomach bug, it’s usually accompanied by a lack of appetite and other signs of disease like a fever. With this condition, your baby may seem quite well, despite the vomiting. You need to tell the doctor about the persistent hunger. He will probably ask you other detailed questions about how the baby is feeding, vomiting patterns and what the vomit looks like.