Vomiting may indicate the onset of a certain disease. So when your baby vomits with any of the following symptoms, you need to take your baby to the hospital immediately. 1. Repeated and violent vomiting This symptom may indicate that your baby has a high fever or a serious infection. If your baby vomits frequently and violently, but is not accompanied by other symptoms, this may be a sign of epilepsy. If your baby vomits when he or she sees certain people or is in certain places (such as a hospital or daycare facility), this indicates that these people or places are causing stress to your baby and causing the vomiting to occur. 2, blood or bile in the vomit If there is only a little blood in the vomit, this is often nothing to worry about, it may be the impact of the food coming back to make the blood vessels in the esophageal wall tear slightly, causing bleeding. However, if your baby’s vomit constantly contains blood or contains increased amounts of blood, or if there is a dark coffee grounds-like mixture in the vomit, you should go to the hospital for an examination. The presence of green bile in the vomit indicates a possible intestinal obstruction, a condition that requires immediate treatment. 3. Violent, persistent vomiting within half an hour of eating It may start when the baby is a few weeks old, although it can occur anytime before the baby is 4 or 5 months old. In babies who develop pyloric stenosis, the muscles in their bodies that control the valve that connects the stomach to the intestine are excessively thickened, causing the opening at the gastrointestinal junction to narrow, preventing food from passing through and causing the baby to vomit. This problem can be solved with a minor surgery, but needs to be treated as soon as it is discovered.