Three year old babies suffer from indigestion and vomiting. You can give them Xiaoer Xiaoshi Granules or Jianwei Xiaoshi Oral Liquid, or Xiaoer Maizao Chewable Tablets. At the same time, you can give them probiotics, golden bifidobacteria or Clostridium butyricum triple viable tablets to regulate normal intestinal flora, or Xiaochaihu Granules and Huoxiang Zhengqi Oral Liquid. At the same time, Pay attention to diet, try not to eat too much, too miscellaneous, and not to eat raw, cold, spicy, greasy, stimulating food, mainly light diet, eat less and eat more. The child is small and the gastrointestinal function is not well developed. Usually, if the child does not eat, he must not force feeding.