Children who frequently vomit can lead to dysfunction of the gastrointestinal system, which is detrimental to nutrient absorption and metabolism, and in severe cases, can produce deterioration. The digestive function of the child’s stomach and intestines is still weak, causing abnormalities in digestive function. When suffering from upper respiratory tract infections, pneumonia, sepsis, bronchitis and other diseases, it can also affect the child’s digestive function and cause vomiting, which may also be accompanied by abdominal pain and diarrhea. Digestive system infections such as gastroenteritis can also cause frequent vomiting, which may be accompanied by fever and diarrhea. Any cause of intestinal obstruction will manifest vomiting along with abdominal distension, abdominal pain, and decreased bowel movements, which can be diagnosed with the help of abdominal imaging. Indigestion caused by cold, improper diet, etc. will also manifest vomiting. Some drugs, such as azithromycin, have vomiting as a side effect, or drugs that affect digestive function may also show vomiting. Some poisoning can also manifest vomiting. Therefore, children with frequent vomiting must be seen promptly for a clear diagnosis. Do not eat immediately after frequent vomiting, fast temporarily if necessary to prolong the fasting time of the child and ensure sufficient rest for the intestines to avoid adding pressure and burden to the intestines, causing repeated vomiting. Keep the food clean and avoid unclean food, and at the same time, the diet should be light and well digested. Let your child rest as much as possible. Pay attention to more hydration, you can drink a small amount of water to ensure water, avoid dehydration due to excessive water loss, such as drinking oral rehydration salts, if necessary, intravenous rehydration support treatment is needed.