Children vomiting yellow water, the main consideration is improper feeding or acute gastroenteritis. 1. Improper feeding: the child’s digestive system is not well developed, when eating too greasy, spicy, cold food, there may be indigestion, causing the child to vomit or even vomit yellow water. 2. Acute gastroenteritis: one of the common causes of vomiting in children. Acute gastroenteritis can be caused by viral infections in the intestines, diseases such as upper respiratory tract infections, etc., so that the child’s gastrointestinal function disorders, resulting in more intense vomiting. There may be other reasons for children to vomit yellow water. Parents should observe their children carefully and seek medical attention at a hospital or clinic to avoid delays in their condition.