When a child suddenly vomits in the middle of the night, it is necessary to consider whether it is due to an inability to digest due to an irrational diet, or a bacterial or viral infection, resulting in an infectious disease such as acute gastroenteritis. We need to determine the cause of the disease according to the accompanying symptoms of the child and relevant examinations. Dietary factors: If the child overeats during the day, resulting in the accumulation of food in the gastrointestinal tract is difficult to digest, or eat more greasy food, and drink a lot of water after the meal, so that the tension of the stomach to expand, easy to vomit symptoms. If the discomfort is relieved after vomiting and no other adverse reactions occur, there is no need to worry too much, and you can give your child lactobacillus tablets or gastrointestinal tablets to promote digestion. Second, disease factors: 1, gastrointestinal inflammation: if the child during the day eating unclean food, or with other people infected with intestinal viruses, may lead to acute gastroenteritis, gastrointestinal flu, the symptoms of vomiting. Need to consult a doctor in time, rehydration through oral saline, acute gastroenteritis is usually not anti-infective treatment, can be used to eliminate Cardotoxin, bifidobacteria and other symptomatic treatment, gastrointestinal flu can be antiviral treatment, with diarrhea can be applied to montelukast; 2, gastroesophageal reflux disease: babies with gastrointestinal reflux disease, can be in the middle of the night, suddenly appeared in the vomiting. Parents are advised to adjust the baby’s sleeping position to relieve the symptoms of vomiting, adjust the feeding method, eat small and frequent meals, avoid stimulating foods, and at the same time, under the guidance of the doctor, apply certain acid-suppressing drugs to control the attack of reflux disease. PrecautionsChildren should not have dinner too late, try to eat light, easy-to-digest food, and do not exercise strenuously before bedtime. Families should pay attention to observe whether there is any abnormality in the child’s vomit, if there is a change in color or smell, they should consult a doctor promptly.