There are many causes of vomiting in infants, because the baby’s stomach is horizontal during infancy, the entrance to the stomach is the cardia, which is relatively loose, and the exit is called the pylorus, which is relatively tight, so it also tends to cause vomiting. 1, overfeeding, indigestion, and allergies to breast milk or formula protein can cause vomiting in infants, pay attention to the position of feeding, and burp the child after each feeding, which can reduce vomiting. 2, gastroesophageal reflux, the baby’s stomach, esophagus between the muscle does not work, will cause reflux, causing vomiting, by the time the child is a week old, basically fully developed. 3.Cold and upper respiratory tract infection. Because the baby produces nausea due to cough or nasal congestion, it can cause vomiting. 4, gastrointestinal tract bacterial infection, or accidental ingestion of toxic substances, can cause gastrointestinal tract dysfunction, causing vomiting and diarrhea, loss of appetite, fever symptoms, should go to the hospital to investigate the cause and timely treatment. 5, excessive crying or coughing can also make the baby cause vomiting, you can hold properly, find out the reason for crying, the problem will be solved. If the child vomits, diarrhea is serious, should promptly go to the hospital for treatment to avoid causing dehydration.