7year old has vomiting after eating and he is feeling stomach is full any time we give ondem syrup but vomit afyer 3 hours he is not eating any food .

A. hi dear For children, it is common for vomiting to occur from a viral infection, food poisoning, milk allergy, motion sickness, overeating or feeding, coughing, or blocked intestines and illnesses in which the child has a high fever. The timing of the nausea or vomiting can indicate the cause.