Five-month-old baby dry vomiting is usually seen in the following cases: first, relatively common is gastroesophageal reflux disease, because five-month-old baby pylorus development is better, while the cardia development is relatively unsound, the stomach volume is small easy gastroesophageal reflux caused by dry vomiting. Second, there may be weak spleen and stomach function, poor digestion, resulting in increased gas accumulation in the gastrointestinal tract caused by dry vomiting. Third, we should pay attention to the possible existence of food allergies or lactose intolerance, food allergens in milk and eggs are the most common, breastfeeding and the mother’s diet has a certain correlation. Fourth, pay attention to whether there is poor liver function, impaired liver function, can also appear dry vomiting. Fifth, if the baby also has other systemic underlying diseases, can also appear dry vomiting of digestive symptoms.