Signs of dehydration such as dry lips and scant urine. Warning Occasional vomiting is not a cause for worry, but if your baby vomits after every feeding in a 12-hour period, call your pediatrician. Action to take Withhold solid foods but give clear liquids as soon as your child can keep them down. As symptoms improve, resume a normal diet. If symptoms last longer than 12 hours, call your pediatrician for advice.
Possible cause is Infection.
Action to take Seek your pediatrician's help for treatment of the underlying infection. Vomiting will stop as symptoms improve. Possible cause is Stress, anxiety. Action to take Let your child talk about what's bothering him. If no cause is obvious and vomiting continues or becomes more frequent, consult your pediatrician.