Children who vomit acid are caused by the following situations: First, it is caused by indigestion and food accumulation, children usually eat too much junk food or overeating, it will cause indigestion, resulting in excessive stomach acid and vomiting acid, you should take probiotics to regulate the intestinal tract, let the child eat less junk food, a small number of meals and a light diet, it can improve the situation of vomiting acid; second, it is a physiological factor, if The baby is still small, vomiting milk and acid are normal, because the baby’s stomach is horizontal stomach, sometimes after eating without burping, it is easy to vomit milk and acid, will be reduced or disappear with the increase of age; third, is caused by gastroenteritis, eating cold, stimulating food is easy to trigger gastroenteritis, and accompanied by diarrhea, nausea, vomiting symptoms, should promptly go to the hospital, in the doctor’s examination and treatment under the guidance of a doctor.