4 months baby dry heaving is usually seen in the following four categories: first, gastrointestinal colds, because 4 months baby resistance is poor, organ function development is not sound, easy to be affected by external environmental factors or intestinal viruses and bacteria and other invasions, caused by acute gastroenteritis, gastrointestinal colds, causing dry heaving. Secondly, some children often dry heaving to consider may be gastroesophageal reflux factors, because the age of 4 months is too small, cardia development is not sound, pylorus development is relatively good, the capacity of the stomach is less, if the diet is not fed properly, there can be gastroesophageal reflux caused by dry heaving. Third, often dry heaving children should also be aware of the possibility of food allergies, breastfeeding is related to the mother’s diet, milk feeding is common milk protein allergy. Fourth, it should also be considered that some children are suffering from liver dysfunction, or poor digestion and absorption, causing increased gas in the gastrointestinal tract and dry heaving.