Neonatal vomiting is a common reason for newborns to be seen. It often causes anxiety and concern to parents. Therefore, it is necessary for parents to know some basic knowledge about neonatal vomiting. Neonatal vomiting is not the same as vomiting in other age groups. It can be functional or a pathological condition, which is closely related to the anatomical and physiological characteristics of the newborn. Neonates have a loose esophagus, poor peristaltic function, a horizontal stomach (vertical for adults), a small capacity, a loose cardia at the upper end of the stomach and esophageal connection, and a relatively tight pylorus at the lower end of the stomach and duodenal connection, making the esophagus and stomach resemble a long-necked open bottle, and the contents of the stomach can easily flow backwards through the esophagus. Small infants do not see obvious nausea before vomiting, vomiting is often sprayed out from the mouth and nose together, but also aspiration pneumonia can occur due to inhalation of the airway. In everyday life, newborn vomiting is often confused with breast milk spillage, but there are some differences between the two. Most of the milk spill is naturally flowing from the corners of the child’s mouth, the child is very peaceful, no obvious abnormal performance. Before vomiting, the child can often be seen irritable, and when vomiting, the child can be seen with a painful expression, vomit often rushed out from the stomach. Causes of baby vomiting are more: the most common is improper feeding, such as feeding too quickly, too much milk, artificial feeding children rubber nipples on the hole is too large or too small, so that a lot of air swallowed into the stomach when eating milk and cause vomiting; swallowing amniotic fluid containing meconium or blood during childbirth; taking certain drugs to stimulate the gastric mucosa; environmental temperature is too hot and too cold to cause gastrointestinal tract dysfunction; internal and external infections of the digestive tract, such as bronchopneumonia Surgical diseases should not be neglected, and we should be doubly alert to all kinds of gastrointestinal abnormalities such as congenital esophageal atresia, pyloric hypertrophic stenosis, congenital megacolon, or atresia or stenosis of any intestinal segment. When the baby vomits, the nature of the vomit should be carefully observed, as long as the vomit is not coffee-colored or bloodshot (except for the mother’s broken nipple), not grass-green or fecal-like material, the child’s stomach is not distended, no fever, flexible response, red complexion, normal stools, and still want to eat after vomiting. In order to reduce the occurrence of vomiting, the child is usually held upright after the milk, lying on the mother’s shoulder and patting the child’s back so that the swallowed air can be belched out, and then gently laid flat to the right side. Pay attention to the feeding method, take the above measures without effect, or vomiting with depression, fever or body temperature does not rise, nasal dullness and refusal to eat, increasingly thin, sunken eyes, dry and wrinkled skin, full fontanelle, shortness of breath, blue lips, foaming at the mouth, gray skin with patterns, abdominal swelling, diarrhea watery stools or bloody stools, stools do not pass any of the signs should be very important, must immediately go to the hospital to identify the cause Timely treatment. Do not delay the time to cause serious consequences.