what to do when your toddler is throwing up
1 The vomit contains blood. 2  A little blood in the vomit is usually nothing to worry about, as the force of vomiting can cause tiny tears in the blood vessels lining the esophagus. 3  Your toddler's vomit may also be tinged with red if he's swallowed blood from a cut in his mouth or a nosebleed within the last six hours.