Full-month baby dry heaving is usually due to physiological factors such as gastrointestinal function is not well developed, as well as indigestion, gastroenteritis and other pathological factors. 1. Physiological factors: full-term babies dry heaving may be due to the gastrointestinal function is not well developed, and in the milk to eat too much or too fast and so on. 2. Pathological factors: due to improper feeding and care may lead to full-term baby indigestion, usually also manifested as dry heaving and other symptoms; if the full-term baby is infected may cause gastroenteritis and other conditions, may also lead to the emergence of dry heaving. Full-term babies dry heaving, there may also be other reasons, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor to clarify the cause.